1) 7 years ago, I got a breast reduction. My breasts, the things that apparently make me 'interently female' were making me ill. Does that make me less of a woman?
No. But that doesn't change the fact that teenage girls having their breasts removed is a travesty.
2) There are safe ways to bind, which I was taught by, god forbid, the NHS, following my reduction, to keep all the requisite bits in place
There are not safe ways to bind young growing breast tissue. Post-surgery wound healing is not the issue here.
3) My ex partner was trans. HE wasn't a pervert, or a deviant, or someone who wanted to look at women in changing rooms. He was someone born in the wrong body. He went through all the surgeries, and subsequently appeared on a popular tv show. People thought he'd been male all his life, because weirdly, with enough treatment, you CAN reassign your gender. DM if you want proof of his existence, because it's readily available on YouTube
Your ex-partner exists. Nobody is doubting that. But she is female - was born female and will die female. Her sex will never changed no matter how much surgery she has.
4) As a cis woman myself, I find the idea of being a woman intolerable. Womanhood is mired with harassment, rape, degradation, solitude. Who would want womanhood if they didn't truly feel they were born that way?
Males with fetishes who get off on the degradation.