Genetically, you are correct. Societally, however, they aren't even close. Its why 6 year old boys aren't eligible for the draft, as an example.
Your inability to discern gender from sex is exactly why you think that way. They aren't the same thing, and you keep treating them like they are. Gender roles exist for a reason. Its why in the 50's it was the norm for men to go out and work and women were expected to stay home and take care of the domestic things. Had nothing to do with one of them having an X chromosome and one having a Y chromosome. We assigned those roles because under normal circumstances, it was more functional for the more physically capable member to go out and do the "harder" work. Sometimes, that more physically capable member happened to also have two X chromosomes. Whodathunkit, right?
I will fix your above statement so its more applicable though...
A male in femaleface (if that was a thing) isn't a female. Nobody is arguing that, no matter how you try to twist arguments. That said, what you would call a man in womens clothing could indeed be more suited to the womans gender role than that of a man.
For clarification, the things above in red are genetic determinants. The things in blue are societal determinants. One can't be argued.....the other one surely can.