Just four short lines and such a lot of nonsense, it is hard to know where even to begin.
I could mention that you seem to have confused this game with a different one and a storyline of being the only male able to repopulate Earth. Here it is not important whether the sex can produce offspring.
But then I would run amiss of pointing out that this would be precisely the difference in the result between a lesbian and a bisexual (which you claim doesn't exist), because a bisexual can repopulate Earth.
Which all of course overlooks the basic fact that even if people are homosexual they can still produce offspring - and have done so for all the time mankind exists. Yes, they cannot with same-sex bed gymnastics, but just because they prefer it doesn't mean they cannot have heterosexual encounters if wanted or needed.
Also the idea that watching F on F action is a "fantasy of the few" easily ignores that lesbian porn and especially MFF porn are extremely popular. But in the end, yes, this whole game is a fantasy. And while choices are all nice and dandy, there are only so many you can implement into a game.
Whether lesbians are gay depends on the usage of the word "gay". It can mean all homosexuals, or it can mean exclusively male homosexuals. On the forums usually the latter version is used to have a quick distinction of M on M sex. So while you're not technically wrong, here you run against how it goes.
Speaking of "how it goes": F95 may not be WokeZone3000, but we dislike kink shaming. You don't like F on F, even with an M inbetween. Fine. The best way would be to just ignore this game then because it includes that. You can also make an argument against including it - though that's already borderline. A rant like yours however isn't well received because even if it were "only a few" interested, they would have the same rights as you and I to have games with their specific fantasies.