Getting killed by your government because your speech wasn't anonymous seems like a pretty big censorship concern to me. Do you believe Nostr can be censorship resistent while being vulnerable to such a simple form of censorship?
Nostr has state of the art encryption and even better, has MLS in the works. Yes its initial focus was social media but there is not really a limit to what can and is being built with regards to the "other stuff"
I made a mistake. I should have double checked. Secrecy and privacy are two different things. Secrecy can be added on top of any communication. Privacy cannot, at least no generalizable method is known yet.