I see you, just the truth is, sometiems you do see stuff you didn't want to without seeking it out. The reason I know about incest games existing on steam is because it showed up on my recommendations or something once, without me actively seeking it out.
Same with other genres of games, they pop up when I've never had interest in that type of game to begin with.
But okay thanks for that second paragraph. I haven't thought of that before. I guess just don't see how they'd think "ok we got rid of the rape and incest, now let's go Nazi on everything else"