The issue here isn’t the biological ‘origins’ of a person but rather their gender identity which is protected from discrimination under Australian law by the Sex Discrimination Act (2013).
Grover basing her arguments on biological factors and not identity was not going to stand up to scrutiny in an Australian court, the defence also argued
Lawyers for Grover… invoked a carve out of sex discrimination law, claiming the app was a special measure designed to achieve substantive equality between men and women.
Which appears to have only been a partially sucessful defence… in that the finding was ‘indirect gender identity discrimination against Ms Tickle.’
I am assuming you’re asking in good faith, though I am not trans myself, believe I can answer this.
Mostly yes, though there are some rare exceptions. There are biological males with an extra X chromosome
https://www.mayoclinic.org/diseases-conditions/klinefelter-syndrome/symptoms-causes/syc-20353949
There are biological females born with XY chromosomes
https://en.wikipedia.org/wiki/XY_gonadal_dysgenesis
The issue here isn’t the biological ‘origins’ of a person but rather their gender identity which is protected from discrimination under Australian law by the Sex Discrimination Act (2013).
https://www.abc.net.au/news/2024-08-23/nsw-sydney-giggle-transgender-discrimination-court-judgment/104260546
Grover basing her arguments on biological factors and not identity was not going to stand up to scrutiny in an Australian court, the defence also argued
Which appears to have only been a partially sucessful defence… in that the finding was ‘indirect gender identity discrimination against Ms Tickle.’