semi- Serious question, Idon’t get it. Most of us get why the hegemonic gender system is stupid, why subscribe to the binary role you were assigned? Also, why do straight people exist? Maybe it’s just me but I like to look and feel like my own perception of what is attractive.
I was born this way. That's the only explanation anybody should need. Mix up the variables in the question, and the answer is still the same.
My son was born feeling like a man. Doesn't matter that he was born with female bits. We live in a world where science can reconcile that. He's him. Simple as.