Not even 99.98% of people have unambiguous genitalia (it's about 99.5-99.97% [1]), before we even get to people with the "opposite" genitalia of what their chromosomes would suggest. An in any case, genitalia was only one of the 4 things I mentioned, and are also one of the ones that can be changed later.
[1] https://en.wikipedia.org/wiki/Intersex#Prevalence