Clearly, you are too sophisticated for your audience, Lacrymas.
From what I've seen, different cultures have different takes on what is art. And by cultures I'm including geeks, artists, etc. Because in my twisted view of the world, the word culture has a broader sense.
Now, why they differ is pretty simple: different brain wiring = different tastes, which in turn = different opinions.
Then comes science, which tries to put everything in a rational order. The trying to rationalize art, to me, is similar to trying to hold a blob of jelly with a sift.
These are all opinions, of course.
Now back to the original topic:
People have already said it and I'm just echoing them: Larian won't use swearing or sexuality in a manner that will break away from their own style. To understand what I mean by their style, well... play all their divinity games for that answer, I'm bad at explaining.
*grin* That broader culture term of your mind is usually culture as sub-cultures, which marks them as part of culture, but outside of mainstream culture, which means than your view seems not twisted at all, but generally excepted well at least on the word meaning of culture.
Furthermore past divinity games had innuendos and swearings, at least if I remember correct. There is just this simple fact that the divinity world is not a dark and dirty world like the witchers one, so there is no point nor reason for constant sex, violence and swearing.
The styles are already fundamental different on world building level which leads to a complete different atmosphere, etc and I like it the way it is. There is nothing inherently wrong with handling it different, I do like the witcher series as well*, but that is a complete different and independent thing.
* from a storytelling perspective, the combat awful and gets with each iteration even worse and at this point I would rather see play witcher the visual novel than deal ever again with that combat system.
