compared to other animals so much of how humans display sexual dimorphism is external, social, not bodily. we have very little physical sex difference compared to so many animal species but we make up for it with behaviours and roles and attire. this permits a more mix and match approach. it's a feature
we evolved to externalise lots of things. we externalise part of our digestive process by cooking food. we externalise parts of our cognitive process with spoken and written language. we do the same with our gender
so much of our selves happen outside our bodies. this is advantageous because it allows us to move past our bodies' limitations

@pisscotheque woah

another way of thinking of this is humans started doing transhumanism hundreds of thousands of years ago