I am not a user of Imzy, so I don't know how they choose to censor, but I don't see how censorship necessarily means living in a bubble.

Take a look at Reddit, where the /r/The_Donald, is just spam, shitposting and fake rumors, nothing to learn. On the other hand, there are subs like /r/AskThe_Donald/ which are very interesting.

IMHO banning communities like /r/The_Donald while encouraging the ones similar like /r/AskThe_Donald, would create a much better place, where you don't live in a bubble, without having to deal with people that just want to spam, shitpost and "trigger".

On the other hand if the troll problem is bad enough it's going to stop non-trolls from commenting. So you either censor the content that doesn't add to the discussion or you lose the discussion as people self-censor/decide it's not worth it posting.

Well, it's a good thing that Imzy is not that. Have a look at their community policy.

https://www.imzy.com/community-policy

Most of those things are also ostensibly prohibited on Reddit. It's just that Reddit's admins don't care to enforce those rules until there's significant controversy.