And FYI, I've seen it happen with one of my own family members - someone who so far as I can tell isn't 'a man in a woman's body', but rather just someone who never fit in and was always a bit of a social outcast.
Their struggle was never their bloody gender, it was their struggle to find a way to fit into the world.
And that's what a lot of transitioning actually is. Because human psychology works such that when we're not fitting in, when we feel insecure and out of place, a subconscious pressure emerges to reinvent ourselves due to the current formula not working for us.
It's offensive to me that you'd make such claims whilst clearly so naive about it.