So guardian - if someone saw themself as female and then had gender reassignment surgery, you'd still not see them as female?
Yes that is correct. Though I might use female pronouns so as not to appear antagonistic.
Is that because of the physical strength thing, the history of growing up male?
It's because I stopped pretending I believe in the possibility of actual 'sex change'.
Someone who has or has ever had testes and a penis cannot be female. Likewise someone who has or has ever had ovaries, womb, vulva and menses etc, cannot be male. Surgeons are not 'God' - they can't perform miracles.
Some people, because of their (and their influencers) narrow, steroetypical view of their own sex, believe they were meant to be born the other sex.
Others have a mental illness where the believe their body is the wrong sex.
These beliefs are dysfunctional and untrue.
They might find relief through pretending to live as they imagine the opposite sex lives. But they haven't changed sex.
Both biology and socialisation according to biology are the reasons why males and females are distinctly different, whichever way they identify, whatever medicine they take or what surgery they undergo.