Pirate Kitty said:
I'm a writer.
I know I can write better characters than 99.9% of the design community.
Ok, here's the real question, if we're talking about video game writing.
Can you write a compelling story and characters around eight hours of set pieces that are already decided and in place? You can't change any of them, and they all involve a medium sized room full of people you shoot at.
You get 20 minutes of cutscenes and not a minute more.
You also have to write 800 lines of incidental voiceover dialogue that will be relayed over the radio. Half of those will be descriptions of the game's objectives. The other half will be colour. You need three variations on each of the colour lines.
When you're done, half of what you've written will be scrapped and you'll have to come up with something different *but you can't touch the other half*. It all needs to makes sense at the end.
You also have three days to do this last rewrite.
Feel up to it?
I don't care who you are, many if not most of the writers in any media industry are better than you. It's not about the writing, it's about writing for the format under production constraints. All of the above applies to movies and TV as well.
Can you write episode 6 of a series? It needs to be understandable without having seen the other five. Also, the plot of that episode must also be understandable if you join after each act break, so basically two thirds of what happens can't be relevant at all. Oh, and you only get to put in one thing that has relevance to the ongoing plot. And you don't get to decide what it is. Everything else must reset at the end of the episode.
It's all about working within the medium. Most people who call themselves writers but haven't been paid to write before tend to think they are better than they really are. As in, much better. As in, they are normally terrible at it, they just don't know. But even if they're good, it's one thing to do it at home, on a spec, all the time in the world and no creative constraints and a very different one to pull it off on deadline, with external impositions and mandated rewrites.
In my experience, if you aren't making a living out of it and you don't know exactly how weak your writing is and why, it's typically all the way weak. There is some comfort in knowing what you can't pull off. At least you get a clear view of the path to improvement.