People who are not clued in have this distressing tendency to talk about “biological sex” when they mean assigned gender, because they don’t understand that aside from certain obvious things, after a while on hormones our bodies have changed in some surprising fundamental ways. My skin has softened and gotten less hairy. My body stores fat in female places. I have breasts that I grew myself. I don’t even smell like a man any more. Because in all of these ways, my body is biologically female.
So yeah, there’s gonna be an asterisk because clearly my body is not a 100% match for a cis woman’s, but as long as we insist on sorting people into two buckets and as long as we’re not talking about my reproductive system, a competent doctor is going to treat my body as that of a woman rather than a man.