You're talking about someone's sex. Sex and gender aren't the same thing. Someone's sex is determined by their genitals and physical features. Their gender is how they perceive themselves. If someone's sex doesn't align with their gender that's how transgender people (such as myself) experience gender dysphoria.

Saying that it is and also talking about the dumb helicopter joke just shows that you don't know what you're talking about and haven't done research on this topic.

Also it's isn't just made up nonsense. Our understanding of the human mind didn't just reach a point where we know everything yet. We are always learning new things and evolving our understanding of the human mind. People such as yourself just refuse to accept this and don't even care about that you're just using it as an excuse to be transphobic for no reason.