1) Calm down, man.
2) LGBT or Queer don't equal "a gay man" - the game includes gay, lesbian and bisexual characters already, and you (the MC) can choose to date whomever you want. Just because the flavour for the starting events, which are meant to showcase how certain mechanics work, is centred around the MC around women, you meet a potential gay love interest literally the first day of university as your guide.
3) Added to that, all the starting events that "skew" towards attraction to women are skippable - you can avoid Dee by not raising the relationship too high, Hinata by literally clicking "skip" and Ms. Madison by not accepting her quest - for the sake of allowing the MC to be roleplayed as a completely gay character.
4) Certain events later in game have the MC put into being very much aroused by not the opposite sex.
5) Even if the MC shows occasional attraction that isn't consistent with completely "straight" or "gay" orientation, the game still includes and explores the themes and includes characters that fit those categories, plus many more. There is a reason why it's in "LGBT" and "Queer" categories, not in a "Gay Main Character" category.