Every small community I'm on on Discord (meaning the majority of the servers I regularly interact with) sets every channel to `NSFW`, and some mark the server itself. They do this because everyone involved is known to be 18+ (Usually higher than that) and they want to be able to have the same discussions they'd have in person.
These communities are not about porn, are not about anything "distasteful", but the flag is set there so that if a topic comes up we can discuss it without risking a ban.
In other words these communities are meant to be a Third Place[0], or an extension of a physical Third Place, particularly recently thanks to COVID.
The content here is literally no different than the content that could show up in a long-running group chat in the Messages app on iOS. I expect a ban for that to be coming in short order as well.
These communities are not about porn, are not about anything "distasteful", but the flag is set there so that if a topic comes up we can discuss it without risking a ban.
In other words these communities are meant to be a Third Place[0], or an extension of a physical Third Place, particularly recently thanks to COVID.
The content here is literally no different than the content that could show up in a long-running group chat in the Messages app on iOS. I expect a ban for that to be coming in short order as well.
[0]: https://en.wikipedia.org/wiki/Third_place