That theres only two biological genders? yeah im pretty sure that theres not a single scientist who disagrees with this.
Every scientist should disagree with this because "gender" is a social construct that is handled differently depending on the region (e.g. in western countries it's binary but in some indigenious cultures it's not). What you mean is sex. Sex is biologically determined - while gender is not. Usually they align. Sometimes they do not. The question is not if gender is binary - it is not of course. The question you are trying to answer is if sex is binary. Well that depends on where you draw the line (or lines). Genetically speaking there are more genetical dispositions than XX and XY.
Here's a good starting point:
https://www.who.int/genomics/gender/en/Especially look at "Gender and Genetics". There's more than XX and XY. But you could make an argument that those in between are all kind of sick (although they are healthy and can reproduce) and still that everyone that has at least one Y chromosome is male (even if the individual doesn't look like a typical male). But one could also argue that sex isn't sorely determined by those chromosomes but of a whole combination of additional chromosomes - for we know by now that DNA and its effects on our body isn't a very linear thing but very entangled.
So if you define everything with an Y as male and everything that has not as female then sure - it's binary by definition. But tomorrow science could also define that somebody with more X chromosomes than Y chromosomes is female. Or just define another sex in between. It's science. That doesn't mean it's set in stone. Like Pluto isn't a planet anymore. If contemporary definitions that sciencists do were irrefutible you might have a point. Alas, they are not.
That doesn't have anything to do with the struggle of minorities though. In my opinion minorities have every right to be loud in order to get heard. Here in Romania there's a German minority. They are mostly white, old conservative people. But they have their special needs too. Maybe they want to keep German city names as alternative or they wat special German schools so that their language doesn't die out. So they are trying to be loud and get heard. And rightfully so. Doesn't mean Romanians have to be offended. Same as christans in arab countries or queer people... nearly everywhere. Be loud - it's ok.
And if somebody decides to picture your struggles and issues in a video game - I won't get mad. I'll be empathic and think about it. It won't piss me off - I'd rather think if I should change perspective for a second and think about stuff I'm usually not forced to think about. And if there's a game that transports a message that I really can't agree with: Whoa! I don't play it! Galaxy brain genius level decision....
That's a very unobstrusive way to deal with it.
Whining in a forum about "politics" in games and confusing all sorts of terms and bringing up "science" as killer argument when talking about a very complex issue is not.