All brains start off female and are then injected (for males) at the appropriate time with an androgen cocktail that is supposed to turn that fetus into a boy. Conversely, girls do not receive this same injection. But what if this does happen incorrectly in timing and/or in dosage and does not leave the evidence after the fact.
This misfire might be relatively rare but happen enough times to affect a sliver of all babies born.
We have other birth defects. There is Down Syndrome, physical abnormalities of every type, intersex conditions and so on. We also have seen fetuses being exposed to endocrine disrupting chemicals (EDCs) as well as to the estrogen infused pregnancy drug DES. It would hardly be far fetched to theorize that some babies were born with a dual gendered or gender reversed brain.
There are also estrogen tinged compounds that end up in our lakes and rivers and are skewing the birth rate towards female babies.
Should we be surprised then that we end up with transgender individuals? I am betting on this theory being correct and if so why can't people correct this disconnect through modern means?
I know I use the argument often here about less being more. Don't jump the gun to transition before you understand yourself. But once having gotten there with a mature mind and a wealth of experience behind you, who is to say you are wrong to do so.
We put dogmatically immovable constraints behind the meaning of man and woman when really the differences are less than our similarities.