Downvoting and disliking can have their own issues too.

On Lemmy, downvoting isn't really that bad, especially compared to Reddit, and that's likely because of the federated model where instance admins can't trust the authenticity of votes. On Lemmy, voting effects the score on the post and that's it, as opposed to Reddit where taking on too many downvotes will shadow ban or lock your account, even if you still have thousands of karma in the subreddit where it happened. Those restrictions also apply site wide. Lemmy users also don't have a global karma count, which removes most temptation to delete posts that go negative and self censor. Of course there are probably many people out there who would delete a post with a 10:1 negative score ratio. Then again if it's that bad then it might not be a bad thing to delete it.

Both models have their place and pros and cons. I understand the nefarious intent behind this change on Youtube, but I feel like hiding negative feedback so that only the poster can see it has potential. It could deter bandwagon downvote brigading. Dislikes are really only relevant to the algorithm and the user who posted the content.