GM4Him doesn't have a problem with sex, he just doesn't want to see it. I'm not unsympathetic to his overarching point, a lot of genre fiction used to be for everyone, "All-Ages", they would deal with mature themes but they weren't shown explicitly. Now a lot of those same stories are allowed to be more explicitly for adults, and feel it's necessary to earn their rating in order to be taken seriously, a lot of the time it feels shoehorned in, like they're checking it off a list (which they probably are). So we get stories made for adults or children instead of for both. I don't think it's as bad as all that, but its true that all the best sci-fi shows I've seen of the past decade probably wouldn't be available to me as a kid, and that's including Star Trek which is kind of sad.
Still the solution isn't less mature games, it's more games. I don't find the sex scenes in BG3 to be vulgar, and if they're serious about incorporating our character choices into them, it could be a way self-censoring the content you see.