The issue here is that a stroke of a pen can render previously legal speech into a jailable offence.
Australia Parliament has just passed new legislation that, for just one example, outlaws reciting Bible verses if the state believes it has the potential to cause offense to someone. Honest criticism of government policies is also to be considered "hate speech". The legislation is retroactive as well so past speech is to judged by this new standard.
I agree that Nostr should not be used to facilitate criminal activity. But maybe the platforms that censor people are much safer in our modern world.