"Dislike attacks", you mean honest critism? If the dislike button and it's counters are truely removed from all YouTube videos, then by that logic YouTube Rewind 2018, would not be the most disliked videos on YouTube since it has 3mil likes. Yes there will probably be hate in the comments, but who reads them? Video has 3mil likes so it must be good.
Seriously removing the dislikes from YouTube sounds like rewarding everyone for participation than whenever or not they're actually good. Only instead this equality is more for encouraging a profit than quality of videos.
This is a bad decision indeed.
Sometimes the huge amount of dislikes prevent us from scam, false news, and hoax videos.
For example : All those of flat earth videos that got many likes and dislikes.
Even those dislikes ratio helped us to get the message done about that early awful Sonic design for the Sonic movie.