Considering the current reddit issue, it seems self explanatory why a non centralized solution is better.

I’ve seen a lot of comments that were against the grain but still upvoted on reddit. I’m not saying they never downvote comments they don’t like but if you are getting downvoted consistently and without interactions it might be more than just being sincere.

Couldn’t they just treat them as subreddits? Subs are essentiallly their own communities already