Alright, hear me out on this one for a sec, not completely sure what I think yet.
Whenever I run across the "homosexual option" in a game like Dragon Age or Mass Effect, much eye-rolling is usually had. The thought that immediately comes to mind is "token gay relationship ahoy!"
That's my instinctive problem with the issue: not the inclusive-ness, but the token-ness. The gay relationships aren't included because it makes sense with the narrative or the setting or the characters, but rather because the developers have a check-box to mark off, to stave off controversy.
Which to be perfectly fair, is a criticism that applies for most romance options offered in any recent title. Romance isn't included in any way that makes sense, it's just there because fans expect it (at least the vocal ones do). However, for some reason the shallowness always seems worse in the gay options--probably because the romance is already awkward and lacking in any nuance when it's written and developed by heteros, for heteros.
I think a lot of times, people just instinctively pick up on the shallow corporate cynicism involved in including a gay option for PR's sake, and it gets misconstrued as bigotry when they balk at it.