This is true, however:
Male and female are biological categories
Men and women are social categories
Chromosome variation is as common as red hair and people with red hair are still people.
And the variations are including but likely not limited to:
45,X [Turner Syndrome]
47,XXY [Klinefelter Syndrome]
46,XY [Mosaicism]
47,XYY [XYY Syndrome]
47,XXX [Trisomy X]
48,XXXY or 49,XXXXY
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And since I have no idea what my chromosomes are, I cannot prove I am female nor male.
If I were to be accurate to genitalia alone, I would be female.
If I were to be accurate to bodily function alone, I would be male.
I could hypothetically be neither, or both. And as of now, it is unknowable.