I'm sorry, but that's almost exactly reflecting real world demographics. You have something like 70% straight, 20%-30% bisexuals and maybe 1% pure homosexuals.
The funny thing is that games like Pathfinder are maybe the the most representative you can possibly get. & if you deviate from that, you start to actually discriminate one or the other group.
Source on those numbers? I'm finding sources that claim a much more even split between those that self identify as bisexual vs homosexual.
I wouldn't call "equal # of romance options for heterosexual and homosexual players" discrimination against the straights. Like, sure, it doesn't reflect real world demographics. But who cares about that? The important thing is that ^ promotes inclusivity, making games a much more friendly place for those who are often persecuted irl, while still retaining equal opportunity for all.