@littlecabbage
I find it interesting to hear that people "know" they are female because they have a vagina and breasts, though it seems a little odd to me. I knew that I was a girl long before I developed breasts, before I even understood what a uterus or a vagina was, let alone that I had them. How did I know? I don't know. I guess because that's what I'd been told.
You will often hear of trans women referring to preferring dresses and "girls' toys" as children, but did you ever stop to think why? How often have you been made to justify your sense of being female? How would you go about doing that, if you didn't have the physical features to back you up? (I've never seen discussions of how trans men respond to this question. Do they get asked?)
I also think that if I were to have the awful misfortune to require a double mastectomy and a hysterectomy, I would still be a woman, and I'm guessing that no-one here would disagree with that. So how can womanhood be the sole right of people with those physical features? It can't.
The awkward fact is that there is no single physiological definition of "woman" which would encompass all women, not even "having two X chromosomes". And in the absence of that physiological definition, on what grounds can we exclude trans women?
Another awkward fact is that there is no universal experience of being a woman. Some women will have their breasts stared at, others will not. Some women have periods, others do not. Some women never have children (through choice or circumstance), some grow them in their own bodies, some use surrogacy, some adopt. Some like clothes shopping. Some do science.
How can "a man" know what it feels like to be a woman? How can you? You only know your own experience. You don't know mine, or anyone else's. You were told as a child that you were female, and accepted it. You never experienced gender dysphoria, so why on earth would you question it?
You talk about looking down to see a female body, being discriminated against at work, judged on your looks, and being mindful of sexual assault - these are all experienced by trans women too. How you are treated in the world has absolutely nothing to do with what chromosomes you have, because, crucially, nobody knows that. How you are treated by society is down to how you are perceived by it, and if you are perceived as female then you will have a female experience.
And please, can we stop with the anorexia comparisons. We don't encourage anorexia because it will very literally kill you. A trans person can change their body to reflect what makes them comfortable, and go on to lead a full, happy and healthy life. They are not comparable.