If I insert feathers under my skin I’m a bird, right?
No, not just feathers. You have to flap your arms and act like one, and then you’re a bird. Transgendered males, that is men who want to be women, often have female friends for the purpose of emulating their behavior. But if they were actually women trapped in the body of a man, they wouldn’t need to. They could just be themselves. So the whole idea of a woman trapped in the body of a man is just fake. The sex chromosome determines your gender, nothing else.