They can kick down my door for things posted, so of course I ban any NSFW
It's all part of the authoritarian backsliding the world is suffering right now. Big centralized services can shield themselves with laws like Section 230, while wielding the threat of prosecution like a cudgel against small operators that aren't "legitimate" in the way that big companies get treated and can't afford the effort it takes to guarantee compliance.
So instead, most would-be operators cave to the chilling effects and users are driven back into the thrall of the big tech propaganda and control platforms.