This place was known for its freedom of expression.... Censoring is the opposite of that
Censorship is dangerous, it begins within the communities, places, and such where they are already on thin ice, or are barely tolerated before spreading into more. NSFW also does not include only sexual things, it can also mean gore and violence, which I feel we have become desensitized to in fiction and can be important to devs wanting to make horror, action, and similar games realistic. Speaking of purely the sexual aspect of NSFW games, they should be dealt with caution & appropriate warnings, it is still an expression of self, experiences, or ideas and there exists NSFW games that serves a purpose other than getting you horny. I can't think of any Itch.Io games at the moment, but the first general media that comes to mind is Perfect Blue. It is an animated movie that directly shows a woman being raped, it is meant to disgust you and it serves a purpose that is not being porn, despite showing nudity and sex. Of course, there are games where they are made by horny people for horny people, which I personally am not objected to removing from Itch.Io as I'm sure there are better websites/communities that would accept it, but these are getting lumped into the same category as the "other" NSFW without any exception. The porn industry, not smut, is disgusting and takes advantage of so many people, but this is not the same as media with fictional sex. This also does not excuse the dev using AI, it's not a very serious topic that requires immediate attention when so much more significant things are happening in the world.