To be honest, the "other content" seems to be an excuse.

I don't buy the "multiple countries' cultures" excuse because this seems to be spearheaded by conservative groups from the Christian anglosphere, the same culture that produces these same games to begin with; and also: other cultures forbid depictions of explicit violence, alcohol, women without their heads covered or publicly disagreeing with their husbands, etc. I don't see a push to ban games which depict alcohol consumption or independent women, do you?

Let's call a spade a spade, and recognize this for what it is.

Also: there's absolutely nothing wrong with erotica in games. Just place it behind the same safety checks as violent games. If those don't work, then they also don't work for violent games, in which case: shall we ban all games with violence?