I dunno, being a man, woman, or black person isn't political. Trans, non-binary, etc is, and normalizing it is political, regardless of if it's right or wrong. I think that you're correct and that it seems like something done as ammunition in the Culture War; normalizing identity politics rather than a design decision done out of a necessity to improve the quality of the game apart from that.
My earlier analogy was about having a pro-life/pro-choice option forced on you, but I guess to make it more accurate it would be more like the game just telling you that you're pro-life as part of your character settings? Because it's not just putting the politics in the game, it's taking a strong side. Again, rightly or wrongly, I can see why some people would resent that in their escapism.