I suspect it's the dev just doing damage control at this point, just like removing the ability to downvote. A comment from 7 days ago, and from an account made only a day prior, just shoots to the top of the page. It even already had upvotes with it when it popped up. It's just more transparent manipulation on top of all the rest.
For what it's worth, I agree with your points. Damaging and stereotyped portrayals of mental illness are unfortunately too common in media - horror especially. Really hoped I'd never see it in Otome though...
Hope you're doing well.