It very much is. i.e. there is no shortage of women with distinctly masculine skeleton. Also - surprise - dickgirls exist. They don't have anything to brag (ar actually reasonably use) in either chest or dick, but yeah. Yes, they were born like that. Very rare, but very well documented.
Even fucking USSR medical blanks had 3 checkboxes: male/female/intersex
We really grasping at any tangent now, aint we?