As you yourself have said many times, who knows what another person experiences. So the truth is that you have no idea whether this "experience of their own sex as a woman" that you are certain trans women really do have in reality has anything whatsoever to do with the people who have female (in the boring old observed at birth sense) bodies.
And nor do they, and nor does anyone else.
All you know is that they believe it does.
Ultimately, the truth of that is unknowable.
So given that following your own arguments we've got no idea how what trans women feel relates to the people who have female (in the boring old observed at birth sense) bodies, or even if it does at all, it's a wee bit of an overreach for you to be claiming not only that they really definitely yes you are very very very sure certainly yes they really definitely are women and that makes them just like the people who have female (in the boring old observed at birth sense) bodies, not just in effable ways of the mind but also in boring practical everyday body ways like getting naked in changing rooms and getting to touch female patients who only want to be touched by another woman.
Because really, while we know they are very very sure, we don't know that they are very very right.
But what we do know is that there definitely are people who have female (in the boring old observed at birth sense) bodies, and that having one of those female (in the boring old observed at birth sense) bodies brings with it physical and social consequences that are nothing whatsoever to do with ones personal and unknowable sense of ones sex but simply to do with external fact of the body, what it can do and how others react to it, and how we in turn react to that,
And therefore it's entirely reasonable to say stop all this flimflammery about how people with male (in the boring old observed at birth sense) bodies may or may not have inner feelings that may or may not be the same as inner feelings that some of the people with female (in the boring old observed at birth sense) bodies may or may not feel because all of that is utterly irrelevant to providing practical supports for people with female (in the boring old observed at birth sense) bodies for the challenges they encounter in the world because of those bodies.
And whatever it is that some people with male (in the boring old observed at birth sense) bodies may or may not feel that may or may not be the same thing that some of the people with female male (in the boring old observed at birth sense) may or may not feel, what it manifestly, obviously, 100% is not is anything that gives them a claim to the supports that people with female (in the boring old observed at birth sense) bodies need based on what they encounter in the world because of those bodies, for the very obvious reason that the people with male (in the boring old observed at birth sense) bodies who may or may not feel the same thing that some of the people with female (in the boring old observed at birth sense) bodies feel do not have female bodies, they have male ones!