I still think Nostr is not particularly good at censorship resistance. From that perspective it is pretty similar to that of RSS, or ActivityPub which have been around for a while. At the end of the day if most companies don’t want to host your stuff then it will be hard to keep it visible. Nostr isn’t peer to peer (yet, anyway).
What’s special isn’t that there are no rules, it’s that you get to choose which rules you want to play by. You choose this in your clients and choice of relays. Most people will want their relay owners to respond to reports, support deletes and blocks, etc. But rather than it being some small group at a big American tech company doing the censoring it can be your friend or your peers or money or some other method you choose.