

The issue is really that it’s not really possible to do good moderation (i.e. censorship) at scale.
When the site is centralized, all users have to get the same basic experience. That means someone needs to decide for the entire world what’s allowed and what isn’t. It isn’t just whether you’ll have porn or no porn. It isn’t just whether you’ll have hate subs, or subs dedicated to violence. It’s where you draw the line at politics. Is sexism allowed? What if it’s just a sort-of sexist joke? Can people talk about Nazi ideology? What if it’s a sub for historians?
What makes something like Lemmy better is that each instance can make their own choices of where to draw the line, and other instances can decide whether to federate with them or not. That way an instance running in Germany might have different ideas of where the lines is when it comes to Nazi imagery, and sex, and violence. One in New Zealand might have completely different ideas. If you’re a user from NZ the NZ instance might match your tastes better, but if not, you’re free to sign up for the German one.



You’d still see them pop up in /r/all or similar spots that showed big posts from other subs.