As to why the focus on sex, but not the other two? At this point censoring violence and cursing would take quite a bit of work, as they are tied to gameplay and narrative content of BG3. Sex scenes aren't - they already seem to contribute little to nothing. Some pointed out that one can skip it without issues, which very much highlights the problem - they ARE disposable. And to be clear, I am not really that invested in having sex scenes removed - they are pretty low on my priority list. If I find them embarrasing, I will skip them. But one can point out how crappy they are - both in execution and concept.
To add on to this, at it's core D&D is a combat simulator. The overwhelming majority of mechanics are built for combat. You can't make a D&D video game while censoring violence; that would basically defeat the whole point. (Okay, you could, but it'd be so different from the D&D experience that it might as well be something entirely different. Insert "play a different tabletop system" comments here.)
Sex scenes, however, aren't core D&D mechanics, or even necessary features of the playing in the Forgotten Realms. Even nudity isn't a necessary feature, as nymphs/succubi/etc don't need to be in any specific campaign. So it's reasonable to think that a D&D game won't have explicit sex in it. At the very least, requesting a fade-to-black option is really not that much of an ask.
