local twitter user forgets how the sun works 
Biological sex is a fucking mess and the roughly 2% estimate that chuds freak out about is itself a very conservative estimate. The load bearing cope that leads them to denying even this is the belief that conditions like Klinefelter syndrome or Turner syndrome shouldn't be counted as intersex conditions. Diagnosis rates are also incredibly low, largely because of bigotry.
The reality is that not only is the scope of which conditions are considered intersex far too restrictive (even where the 1.7-2% estimate is reached), but these conditions are massively underdiagnosed. A more realistic and all-encompassing view of intersex conditions with an accurate diagnosis count should result an incidence rate of around 5% of the global population, with rates somewhat higher in some communities.
People cannot handle this reality because it destroys their world view.