For example, sure there might not be a gay gene, but no single gene for most things. It's not how it works. You need to accept the fact that would you were taught in schools is a very simplified version of the real world. It's difficult to teach children the far more difficult intricacies of life.
Also, no one is actually identifying as an attack helicopter. That's a joke that is mostly at the expense of the trans community that became a meme.