Two questions are at the crux of all of this:

If a narrow binary definition of gender is so innate, why are so many rules around it needed, and why does that need to be coercively enforced? If it's natural in that narrow definition, then it should be natural, right?

And if it were natural to only behave in certain ways that have been coded for your gender, why are there so many, many people who don't fit into that -something that has been in evidence since at least the dawn of recorded history (and almost certainly before)?

I can attest that I am a lot more logical, rational, assertive, courageous and practical than a lot of the men I meet on the internet. 😉 I'm also highly intuitive, nurturing, and in touch with my emotions. 🤷‍♀️