yeah? That doesn't prove your argument at all
Firstly, while it's currently only got girls in it, they state that they literally plan to add FUTANARI to the game. That's not exactly completely "straight".
Secondly, there's literally no downside to adding a Male toggle or alt to the characters, because it's a wider appeal to more people = more patreons.
Thirdly, there's not really any good gay Minecraft NSFW games anyway. None that are free, this is the best Minecraft one that I've seen in general that's both actively updated and high quality.
First of all. The author of the game, Crime, is already planning to add Futa, and they are a pro-LGBT, its up to them if they want to explore that route or not.
2nd. Even if he added it, you don't have to unlock the character. You can just ignore it, you know?
3rd. There is no harm if he added a femboy character. You said "There are plenty of gay games out there", well darling, there are plenty of straight games out there, you can play them if you want.