If anyone reads scientific literature/mainstream sources, sex is the biology (nature) & gender is the social construct (nurture). Humans reproduce with anisogamy: two gametes.
Are both sex & gender now considered social constructs in current discourse?
However, the destruction of sex as a descriptor sounds terrifyingly dystopian to the very vast majority of people.
With a more precise definition, the true prevalence of intersex is about 0.018%."
ncbi.nlm.nih.gov/pubmed/12476264
We should support the variety of gender identities without disregarding scientific facts.