Again, literally not true because of how big sites that aren't steam for those games are, and how many games are being made and how much they sell on steam.

Yes obviously no one is saying elden ring will have pornography, but there are a lot of games that did sell or would sell more with more romance and to a stronger extent sex stuff in them.

For example take an RPG, like Witcher, Cyberpunk, etc. They skirted the line but it's obvious that people want to get to that point in the in-game relationships, it is what it is, it might offend certain people but fact of the matter is, I don't think the people offended are a majority.

You can always have that content as a DLC and sell it separately and or to block it from countries that don't allow it, but let's not pretend like it doesn't sell.