Yes, if censorship resistance is an anti-feature for a community organizer, they won't use nostr. That's ok, centralized use cases can use centralized solutions (although integrating nostr would still have benefits, if only for portable identity). This is a question I've been mulling over for a long time now. Nostr is really only useful for open and semi-permeable groups. 

 Interesting. Hmm I was hoping that people can plug in their identity into this. So nostr is not the right tech stack to do this?  

 You could make exclusive content work, either with encrypted groups or some other method of signature stripping, but you'd be cutting against the grain. Still, this is something I'm very interested in experimenting with on nostr.