I highly doubt you would agree that I'm a man if we met. Even if you could tell I was trans id still be willing to bet you wouldn't be able to internally conceive of me as a man. I am very conventionally feminine and dress and present myself in a way that is very in line with how other women my age dress and present.
I have had reassignment surgery, so nothing would happen if the pills were taken away. My body does not produce any more testosterone than a cisgender woman's does. Even if I hadnt had reassignment surgery, biology still isn't how we determine gender. My gender wouldn't change in the absence of medication.
I don't dispute the fact, I pointed out that I don't believe you. It's fine if that's true though, because i then shared my own experience of being mistaken for a girl many times as a child and teenager. I was assigned male at birth, so at the time saw myself as a boy and I think you'd agree at the time that I was. I still was called a girl all the time. When I corrected people, they accepted the correction.
I stated a lot more about how gender isn't biologically determined in the above. If you want to challenge individual points I've made, I'd like it if you could actually respond to those points. Instead of just blindly state that you're right despite all the challenges I've made that you haven't responded to.