They can already do this. Youtube's excuse is, "It paints a bad image when someone disables their likes and dislikes". So people organically find a way to circumvent restrictions placed on them just like they will with this. It's like so much of what the government decrees, it doesn't actual "fix" what they don't want, it just makes things more tedious for everyone.
Didn't know they could. Which only begs the question why disabling dislikes does anything. This can only be for manipulative algorithmic purposes, I'd assume.
...I'm going to offer a contrary opinion to the "corporations are to blame" knee-jerk. You have no idea how valuable that information is.
Let me put it this way: if I'm running a display ad campaign, I want as much data as I can get on how people interacted with it. I want to know how many people saw it, I want to know what keywords led them to it, and I want to know how many people clicked on any part of the ad. I want to know how many people followed a referral link (and what percentage that is of people who viewed it), I want to know what those people did after getting to the landing page, and I want to know when and where the ads had the most traffic. The like/dislike button is another point of data giving you early warning about how your content is being received. That is something you want to utilize, not suppress.
I'm not sure how telling dislikes are, though. I mean, consider how many people sit through an entire video's content... just to ultimately dislike it. I've started hundreds of videos and stopped them after a minute or two and they weren't even worth my time to officially dislike them. It takes a second to dislike a video. It also takes a second to
like a video, but a like is more telling since it means someone ostensibly sat through it and enjoyed it enough to throw their hat in the ring of "yes, I want to see more stuff like that." I'm probably what most would considered a liberal; I could go on YouTube right now and click on as many conservative videos as I can find and dislike them within 5 seconds of the video even playing. Conversely, as a liberal, I could find as many liberal videos that align with my thinking, and I'd probably watch those videos in their entirety to appreciate the echo chamber of my beliefs, and I'd "like" them. Point being, I think dislikes should be less heavily weighted than likes for the simple fact that they can be easily weaponized.
Honestly, I think disable both likes and dislikes and just let total time watched be a measure of a videos content. If a 5 minute video has 1,000 views but only 4% watched the whole 5 minutes, then you know it's probably not worth its runtime. But if another 5 minute video has 90% of views that ran the whole length, it's content is substantive or at least engaging enough that most people watched the whole thing.
Maybe the solution is to not make liking/disliking a video so easy as a click. Maybe require the "voter" leave a comment that shows they actually watched the video and had actual opinions based on its content before their "vote" applies. That'd definitely weed out some of the casual, drive-by opinions of every stripe.
Or just not care. It's fucking YouTube. Anyone living off of endorsed wages via YouTube needs to get a real job and quit bitching about how a largely free service robs their pockets.
I have opinions.