Earlier quoted context omitted.
Because you can't see a video has a 1:9 like:dislike ratio to tell you it's not worth your time. Granted, you'll (probably) be able to tell from the comments, for now. I'm not convinced how much it'd actually impact watch time, but it seems to be the thesis.
I never checked the likes to watch a video, I think if you have enough YouTube "experience" you can probably figure out what videos are good and which aren't. (No hate, just my opinion, I don't care about the likes)
High view count does not mean high quality. They are pretty orthogonal.