Being a bi man leaning towards men, I'm aware that those kind of people exist, but I don't know why are you bringing that up.
If your concern is to avoid having sex with women, among the options I've listed, there is the option to escape the fight. If your concern is molestation and sexual assault, than yes, this game is not for you, since your character will be molested, will be raped and will rape.
I'm not questioning the fact that is lazy or that it could be implemented better, I'm questioning the fact that being straight or gay in the game has no function, and that is a problem so big that makes the game unplayable if you want to play as a gay man (while if you'd want to play as a staight man I'd agree).
The game doesn't use the same logic as reality: using a potion doesn't imply that your sexuality is a choice, but it's a game mechanic that allows you change your choice and experience the game in a different way. You are not your character, you pay as your character.