how do you know this? just because YOU think it can't happen doesn't mean shyt. let me guess, you think it can't happen because someone else told you it couldn't happen. you do realize that gender roles are actually influenced by your environment right? you might have been one of those kids that played with barbie dolls, wanting to wear a dress and etc and your parents scolded you for doing that shyt because to them, "boys are not supposed to play with girl's toys or dress up like girls." you might still feel that you're a girl trapped in a boys body but you were taught that you had to behave like a boy since you were born that way. there's a difference between sex and gender. sex deals with your physical frame. gender deals with your mind. some people are born of the male and female sex but their minds are wired to be the opposite sex to the point where that's how they view themselves and identify with. you're just being ignorant.
Wow...you're the one who's completely ignorant. So now gender is determined by playing with dolls or wearing dresses? That's ridiculous. Toys and clothes have been established by culture, not by sex. I repeat, this person is 6 years old! They have no clue what it means to be trapped in a boy's body because they haven't established that identity yet.
Not to mention that a 6 year old should not be determining what kind of clothes they wear. When I was 6 I hated the outfits my parents made me wear. I squirmed and complained and wanted to wear completely different stuff. Guess what? I had to wear them and it was called parenting. I probably would've worn dresses too if my parents hadn't raised me specifically as a boy. Kids identities are determined by parenting and environment. It is clear to me that there is a severe lack of parenting going on here. A 6 year old does not determine what they are. Their parents do.
I know this because I'm speaking as a man reflecting back on being a boy. I wasn't a boy because I felt a certain way. I was a boy because that's the way I was raised. Who I am today is a product of how I was raised.