"I" am a bloke. "I" as in my self-aware-self. "I" as in "my non-physical self".
The body that "I" Inhabit however, is not a boy. Even if I change it, it'll still require me to manage it's hormonal balance myself manually. It'll never function 100% like it would if it had been male to begin with. And nothing I do to it will change that it was born female.
I will always have taken that step to change my flesh to fit who "I" am, have always been and will always be. That is to say, "I" am a bloke, and always will be, but at the same time, just like I have brown hair, am right handed, and so on, I will always also be a trans-guy.
Being right-handed isn't my identity. Being brown-haired (turning gray fast) is not "who" I am. But it doesn't change that I'm right-handed and brown-haired. Just like trans is something I am, but not "who" I am.
I don't see why people can't accept that both apply.
I am not my body, I am not my haircolour, but that doesn't mean my body isn't my own or that my haircolour changes itself.
"I" am myself, always will be,... but that doesn't change the physical facts...
I'm a bloke, but no amount of me being a bloke will change that I was born with the wrong equipment.