Like why are people ok with the violence and killing and murder, but lose their mind when we see some bare flesh,,, a breast or a buttock.
Sure, that's easy enough to explain. I am not really ok with glorification of the violence and killing and murder, however, fantasy worlds, like that of Forgottem Realms, has made them more agreeable. From what I understand about Forgottem Realms, it is rather similar to the world Tolkien created - meaning it has living personifications of good and evil. Elfs are good and that is that, and orcs are evil and that is that. Removing evil makes things better, therefore killing orcs is not only acceptable, but a good thing to do. On top of that, stories have a long tradition of personify concepts - so presenting characters in a physical conflict, while focusing on ideologies that drive them. A simple example of that would be superhero stories, were villains are usually dark reflections of the hero - so while there is a physical conflict between the characters, a good superhero story will focus on what drives and divide them. Even in that simple narrative, reducing the story to "two guys punching each other" would be reductive. That's is really the space classic BG1&2 were occupying.
I haven't really seen no such "different world" rules for sex in the world of BG, nor a narrative significance behind it. As such I am much less OK with them, as the game and the world did no attempt to decouple the ingame act, from its real world moral connotations, or justify their inclusion. Of course, I have to stress that what I have seen are only two romance scenes - Minthara and Shadowheart. Shadowheart was fine so far, though clunky and awkard and Minthara's was part of an absolutely attrocious evil path - not in terms of "mature content" but how poorly it was put together. In that regard Larian is living up to Bioware legacy, as they always struggled to make decent non-good paths. So it is possible that in the end my dislike for Minthara sex scene, is just part of a larger problem of evil path being rather shit.
I would also want to stress that I don't mean to say that there is no place for a more deconstructionist approach. I dislike R rated comic stuff, which add R rated content, without changing anything else, but stuff like Alan Moore's "Watchman" (I know, an easy example) is great. In fantasy RPG terms Dragon Age:O attempted something similar, with mixed result IMO, and so did Pillars of Eternity and to some extend Witchers. Baldur's Gate3, however, so far offers no spin on traditional fantasy tropes, nor commentary on traditional hero stories, doesn't create a more grounded worlds. Some call it "adult fantasy" but it is really not shaping like that so far. What I have seen is very basic story, filled with characters with a very shallow emotional depth. It just has more violence, cursing and sex but otherwise, mature it is not.
There is a wonderful quote by James Gunn after Deadpool was released: "... over the next few months... you'll see Holywood misunderstanding the lessons they should be learning with Deadpool. They'll be green lighting films 'like Deadpool' - but, by that, they won't mean 'good and original' but 'a raunchy superhero film' or 'it breaks the fourth wall.'" We have also seen TV shows attempt to emulate GoT success by stripping other IPs of their identity, desperately trying to create GoT knockoffs. That is what Larian is doing in my eyes, looking at Dragon Ages and Witchers and wanting to emulate their success, and not asking why they succeeded, or how they can create their own good game - they just take and strip bits of those, use strong IP and stitch them to their D:OS formula hoping for the same impact. Couple pages back some defended Larian as artists, but coherent and confident artistic direction is what this game desperately lacks.
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.