I think that’s a stretch in this case. The stated goal is to make the game match medieval social norms, and the game is a medieval themed fantasy game. An openly lesbian core character breaks that immersion.

Now, if they removed homosexuality entirely from the game, I could see your point. AFAIK, the player can still have homosexual relationships and RP in any way they want, only one core character switches from a woman to a man.

I wouldn’t install it, nor would I recommend it to anyone, but I honestly don’t see any hate here.