It's a very good thing to avoid what happened on Reddit that a big istance is moderated by people that don't think democratically and rule against other people's will deleting posts and banning everyone they don't like.
With federation, you can choose the instances and communities you like the most, the ones with better moderation and so the kindest one will probably prevail :)
How do we deal with similar communities on different Lemmy instances?
Say what you will about reddit, at least an established subreddit was the place to gather on the topic, ie r/technology etc....