I can see two sides to this argument, one I agree with, that mods while requiring a lot of work aren't usually on the same level as DLC for a game. And the argument that people should get paid for their work. Now obviously I'm biased against one side of this argument(and its the one for paid modding I'm just gonna lay that out right now) and I'm gonna put down a few reasons as to why.
(keep in mind when I say Skyrim here the criticisms can be applied to any of Bethesda's games and actually gets worse for modding the farther back you go)
1. Installing mods is a pain in the ass and if done wrong, or even in the wrong order they don't work, at all. You might ask me why that's relevant to this discussion, well its very important. Steam Workshop has no capacity to do this, if you go to the nexus it asks you which files to overwrite but the Steam Workshop will just blatantly overwrite the mods you already have installed.
Basically the steam workshop is a VERY shitty place to install complicated(that is mods you would actually want to pay for) mods.
2. Skyrim doesn't have the capacity without the use of other tools to have two mods modify the same thing. That's blatantly obvious, but you might not be aware of what "one thing" refers to when modding Skyrim, for example "More loot from chests" is completely incompatible with any mod that modifies drops in chests, because the lists for loot chests(each individual list) are considered one item. So if you have a mod that adds Meridia's beacon to a chest in some random bandit cave, then that chest will only have whats in the list from your mod irregardless of what other mods you install outside of a Bashed patch. If you have a mod that adds a single apple to the lucky 38 in New Vegas then its completely incompatible with any mod that modifies that cell in the Lucky 38 because that entire cell is considered one item for the game.
3. Mods can break your save files and destroy hours and hours of progress. Ever hear about a mod called "Civil War Overhaul"? Well you see its made by a real asshole who unfortunately was given a talent for modding, but absolutely no talent for anything else. He can't balance a mod, he can't write an informative description(he just fills it with memes and deliberately leaves out important stuff), he can't even gracefully accept criticism of his complete lack of understanding how to balance a mod(I half expect him to come into this thread after I invoked his name). All that is important because uninstalling the Civil War Overhaul will completely and utterly destroy your save file and there is no fix, this wouldn't normally be a problem but the modder deliberately hides things that you might not want in your Skyrim install in his mods. So you pretty much have to go in blind and when you find out inevitably what sucks about his mod tough luck that save file is garbage.
Imagine if 15 days after you installed a paid mod that has lots of shitty hidden features you find out that you can't even get a refund for it and your entire save file is strapped to that one mod.
4. Mods can break other mods and mods can break Skyrim. I don't even need to explain this one but installing even so much as a clothing replacer mod can crash Skyrim, no seriously there is a fix specifically for people who installed skins into Skyrim so that doesn't crash the game on a certain quest, the bug is still here to this day and you're basically arguing that Bethesda should get a cut from a game they left in a state where it could crash when skins were installed.
5. You think steam greenlight is bad, wait til you see this. The only barrier to entry for paid modding was 5$ to buy Skyrim when it was on sale. Keep that in mind, the barrier for greenlight is 100$ and not only that anybody can make a mod for Skyrim if they have Skyrim and access to youtube tutorials, Bethesda deliberately made modding Skyrim to be as easy as possible. What you're going to get is every teenager who thinks they can make any money at all off of this flooding the market with anything they can make or port over from one of those asset stores.
Some people think this will be a golden age where you can make money off of modding, the more realistic outlook and what steam greenlight has taught us is that people want money for nothing or at least very little and the only mods likely to make anything are the mods that are already popular and a few outliers that randomly get a lot of attention. Everything else, including the free mods that are worthwhile will be buried in a tidal wave of low effort 9999 damage "cheat swords".
6. Nobody cares enough, and there isn't enough manpower to police paid mods. Its not only that people could steal assets from other games and sell them, its that people could steal mods from other people and sell them. They don't even have to be people who live in the US and speak English, I know Japan has a modding community and once your mods are an entire country and language barrier away what options are given to these people to prevent their work from being exploited? Nothing Valve doesn't give a shit about people not making money off of their work and will happily send out checks like they were robots to anybody who got that mod onto steam first.
Again I see the argument that "modders should be paid for their work" come up a lot but nobody seems to consider how little Valve cares about the right people being paid for their work.
I could go on more, but I think those problems are seriously more than enough reason to deny paid mods, or at least paid mods for Bethesda on Steam. And you could argue any of these points til you're blue in the face and cherry pick that "people should be paid for their work" but that doesn't make these problems go away, or go any distance to making Valve put in any effort to fix these problems in the first place. AND THAT IS THE IMPORTANT THING HERE, if you want paid mods fine, TRY AND FIGURE OUT A WAY TO FIX THE PROBLEMS BEFORE YOU START A CAMPAIGN TO PUSH THIS TRAIN WRECK THROUGH. Because with Valve and Steam the way they are now I can't see people wanting to continue with paid mods at all.
(I'm not capitalizing words here because I'm angry, I'm capitalizing words because I think those are the most important parts of this that needs to be addressed and cherry picking around them is much harder when they stand out like that.)
(keep in mind when I say Skyrim here the criticisms can be applied to any of Bethesda's games and actually gets worse for modding the farther back you go)
1. Installing mods is a pain in the ass and if done wrong, or even in the wrong order they don't work, at all. You might ask me why that's relevant to this discussion, well its very important. Steam Workshop has no capacity to do this, if you go to the nexus it asks you which files to overwrite but the Steam Workshop will just blatantly overwrite the mods you already have installed.
Basically the steam workshop is a VERY shitty place to install complicated(that is mods you would actually want to pay for) mods.
2. Skyrim doesn't have the capacity without the use of other tools to have two mods modify the same thing. That's blatantly obvious, but you might not be aware of what "one thing" refers to when modding Skyrim, for example "More loot from chests" is completely incompatible with any mod that modifies drops in chests, because the lists for loot chests(each individual list) are considered one item. So if you have a mod that adds Meridia's beacon to a chest in some random bandit cave, then that chest will only have whats in the list from your mod irregardless of what other mods you install outside of a Bashed patch. If you have a mod that adds a single apple to the lucky 38 in New Vegas then its completely incompatible with any mod that modifies that cell in the Lucky 38 because that entire cell is considered one item for the game.
3. Mods can break your save files and destroy hours and hours of progress. Ever hear about a mod called "Civil War Overhaul"? Well you see its made by a real asshole who unfortunately was given a talent for modding, but absolutely no talent for anything else. He can't balance a mod, he can't write an informative description(he just fills it with memes and deliberately leaves out important stuff), he can't even gracefully accept criticism of his complete lack of understanding how to balance a mod(I half expect him to come into this thread after I invoked his name). All that is important because uninstalling the Civil War Overhaul will completely and utterly destroy your save file and there is no fix, this wouldn't normally be a problem but the modder deliberately hides things that you might not want in your Skyrim install in his mods. So you pretty much have to go in blind and when you find out inevitably what sucks about his mod tough luck that save file is garbage.
Imagine if 15 days after you installed a paid mod that has lots of shitty hidden features you find out that you can't even get a refund for it and your entire save file is strapped to that one mod.
4. Mods can break other mods and mods can break Skyrim. I don't even need to explain this one but installing even so much as a clothing replacer mod can crash Skyrim, no seriously there is a fix specifically for people who installed skins into Skyrim so that doesn't crash the game on a certain quest, the bug is still here to this day and you're basically arguing that Bethesda should get a cut from a game they left in a state where it could crash when skins were installed.
5. You think steam greenlight is bad, wait til you see this. The only barrier to entry for paid modding was 5$ to buy Skyrim when it was on sale. Keep that in mind, the barrier for greenlight is 100$ and not only that anybody can make a mod for Skyrim if they have Skyrim and access to youtube tutorials, Bethesda deliberately made modding Skyrim to be as easy as possible. What you're going to get is every teenager who thinks they can make any money at all off of this flooding the market with anything they can make or port over from one of those asset stores.
Some people think this will be a golden age where you can make money off of modding, the more realistic outlook and what steam greenlight has taught us is that people want money for nothing or at least very little and the only mods likely to make anything are the mods that are already popular and a few outliers that randomly get a lot of attention. Everything else, including the free mods that are worthwhile will be buried in a tidal wave of low effort 9999 damage "cheat swords".
6. Nobody cares enough, and there isn't enough manpower to police paid mods. Its not only that people could steal assets from other games and sell them, its that people could steal mods from other people and sell them. They don't even have to be people who live in the US and speak English, I know Japan has a modding community and once your mods are an entire country and language barrier away what options are given to these people to prevent their work from being exploited? Nothing Valve doesn't give a shit about people not making money off of their work and will happily send out checks like they were robots to anybody who got that mod onto steam first.
Again I see the argument that "modders should be paid for their work" come up a lot but nobody seems to consider how little Valve cares about the right people being paid for their work.
I could go on more, but I think those problems are seriously more than enough reason to deny paid mods, or at least paid mods for Bethesda on Steam. And you could argue any of these points til you're blue in the face and cherry pick that "people should be paid for their work" but that doesn't make these problems go away, or go any distance to making Valve put in any effort to fix these problems in the first place. AND THAT IS THE IMPORTANT THING HERE, if you want paid mods fine, TRY AND FIGURE OUT A WAY TO FIX THE PROBLEMS BEFORE YOU START A CAMPAIGN TO PUSH THIS TRAIN WRECK THROUGH. Because with Valve and Steam the way they are now I can't see people wanting to continue with paid mods at all.
(I'm not capitalizing words here because I'm angry, I'm capitalizing words because I think those are the most important parts of this that needs to be addressed and cherry picking around them is much harder when they stand out like that.)