Safe to say there’s a strong correlation between the growth of a social network and nsfw content being present on it. Twitter has allowed this since the early 2000s. And when other sites banned it in late 2010s, this subculture became one of the fastest growing ones on Twitter. If a person doesn’t like it, they can mute or not interact with it. But to say nostr is only for a certain group or not for another makes no sense. Hate it or love it, like bitcoin, nostr is for everyone