You mention Wrath of the Righteous where sex is a prominent thing tied to the development of a character and, in my opinion, that's exactly what the sex scenes of BG3 achieve. You are, of course, fine to disagree.
And I do. No companion arc in BG3 is influenced by sex and would happen exactly the same way without it or less graphical ones which would leave more resources for more important things.
Gale is the best example for this. Him having sex with you, thus being unfaithful to Mystra should have a big effect on his character development. But it has not, his arc continues exactly the same way as if he did not have sex. This shows that BG3s sex is not there for character development.
And don't only focus on how easy and meaningless it is to have sex with companions as evidence of BG3 being oversexualized. Also look at how much effort was spend on it. Why was there a need for customizable genitals (which Larian proudly mentioned for marketing purposes, answered my own question there) or intimacy coordinators? Was there a need for a bugbear fucking an ogre in a barn? To read about dragonborn mating practices (which does not even match the genitals Larian were so proud of) or a detailed account of Raphaels bedroom performance? Or even a brothel with drow twins? Does any of that enhance the game? No. But Larian put it in anyway as distraction from otherwise pretty generic and predictable plotlines and to cater to the bear sex demographic Larian worked so hard to attract.
