It’s a distilled version of ‘the wisdom of the crowds’. With all the dog piling that comes with reactions to things that are pointed at the wrong audience. There’s generally some people with baggage in there somewhere who will take issue, and you get downvoted.
However, what’s always interesting about these platforms is where good ideas rise, where they come from, and how controversial they are, all of which you lose with the twitter/mastodon architecture.
It may be easier to find your crowd, but how useful is that to you depends on what you use your online presence for.