Yeah it should still look to them. But they all might not have the create community event. Maybe only one or another does. Identities are fully decentralized in nostr but nostr notes aren't any more decentralized than fediverse messages. Maybe less in practice as people huddle around a few central relays. I don't think that is a huge cause of concern yet though as it's still easy to host one and the nostr community as a whole is very anti censorship. I think spam and over compensating for spam will be a bigger problem in nostr than blatent censorship