Don’t get offended by this, it’s just something I thought of.
If gender and sex are really two completely unrelated things, then how can someone be born into the “wrong body” or even into the right body? Wouldn’t you just be into ~a~ body? Shouldn’t it not matter which kind of body you are born with? I mean, who’s to say that a body equipped with breasts and a vagina is a “female body” and that a body with a penis and flat chest is a “male body”? People get so caught up in trying to explain that “gender is in your head, not between your legs” but it’s actually a bit contradictory. If it is just in your head then why is what’s between your legs relevant at all? Perhaps gender defines sex, therefore making no one actually transgender.
The reason it matters what body you’re born into is because the second you’re popped out of the womb someone smacks your ass and tosses a label on you that you’re forced to wear until you can convince everyone you meet that you are you and not what some doctor guessed you are before you could even speak up and say anything about it. It’s the way that our culture perceives me that is forcing me to change my body just to feel comfortable with myself. I didn’t feel this way before puberty because nobody tried to tell me I was a girl and not a boy (mainly because they couldn’t fucking tell). I wasn’t bothered by boys should do this and girls should do that until someone told me that I should stop doing so many boy things.
If everyone believed what you wrote, then there wouldn’t be anyone who is trans*. There would just be people who feel comfortable and people who need a change (and some might not even need a change without that societal push to fit into a box). But we don’t live in that world. That’s why gender and sex aren’t the same. They’re related, of course, but that doesn’t make them the same, in much the same way that frogs and toads are similar but not the same.