I may have missed your point. Could be my brain is fogged. Or it could be you didn’t articulate it well.
Still, I don’t find merit in your post. A male believing he is a female may be showing some sign of mental illness. But as long as the guy doesn’t try to use the ladies room, the female locker room or to compete against women on women’s sports, I don’t care about that, either.
Just like I don’t think I need to care about homosexual males or lesbian femal’s private behavior. (I also don’t believe that being “gay” is a mental defect. I liken it to some crossed wiring. But it doesn’t affect other people, so I stand by what I said: it’s not my business.)
Not sure how that has anything to do with our right to possess guns.