Bang on -
https://en.wikipedia.org/wiki/MetallicityTo be clearer (and fair to the context): "Pure" intersex is
conditions in which chromosomal sex is inconsistent with phenotypic sex, or in which the phenotype is not classifiable as either male or female", stating the prevalence of intersex is about 0.018%
whereas more general chromosomal aberrations that deviate from " unquestionably male " or from " unquestionably female " come in at just under 2% (as I recall).
FWiW I believe there's a bit more to behaviour than pure genetics but it's a hard one to pin down; outside of western society there are many places with a long history for not caring about gender nearly as much as abrahamic westerners seem to; the Bugis, pacific sistergirls, etc.
From a datascience perspective there's a non zero number of actual people in Australia that are born intersex and neither male nor female at birth to warrent a non specific gender entry on passport databases .. as a matter of cold pragmatic fact divorced from any "woke" and|or "culture war" politic posturing.