Hello Michael,
Welcome to Susan's...
Very interesting post, and, no certainly doesn't offend me

.
Funny you mentioning the 50'ish view of the world, because that's exactly how it was then, I was a UK born male. But right from around 4 (earliest memory) I felt at odds and wanted to be a girl, had no sisters, and, had then 1 brother and then a couple of years later another brother. But there I was, knowing I should be a girl. I didn't even know about physical differences till around 5, when sharing a bath with my girl cousin... then I realised and suffered many years. It was around 40 odd years later that I was not unique and had been struggling with my emotions all that time.
I recall that when I asked our family Dr why aren't I a girl, all those years ago, he turned to my mother and said, its a normal thing for a child and they'll grow out of it.
But guess what, you don't! your attitude, demeanour are all wired female, or male for FTM, some of us can manage it well, others not so. But each wave of emotions keep coming, stronger and stronger, very seldom can you ignore it.
Today acceptance is slightly better than many years back, so more and more are happier to actually open up to who they are and release themselves from effectively an internal prison.
Personally I still have a little way to go, but even now I can honestly say, the knowing you are not alone and being able to come out of hiding, making those changes is so regenerating to your mind and soul.
As for binary, it does depend, I guess on how your emotions effect you, how strong that mind's view of yourself is?
Not sure if that helps a bit.
But in any case welcome and see you about the forum's.
L Katy