Lucky Kite on Nostr: Great, but if nobody uses the small relays that choose not to ban its not much ...

Great, but if nobody uses the small relays that choose not to ban its not much practical use. In the end we just have to trust the big servers to not censor. Nostr becomes centralised around the big well funded well known servers.
Saying ' well its not censorship because you can always take your freespeech somehwere else' is neither a technical or philosophical solution to platform censorship,. Every other platform uses this clause - of course anyone can put their posts elsewhere eg on Mastadon or Nostr or twitter if censored by one platform. But that has its limitations, and those limitations aren't solved with Nostr anymore than they are with Mastadon.