From the opening sentence of the article:
In a new piece for Scientific American, Princeton anthropologist Dr. Agustín Fuentes argues that the binary of male and female is too simplistic to describe the complexity of human sex
Academia has become gripped by a new religious dogma that must not be questioned. They're trying to redefine the basic scientific terminology of sex in order to appease an unscientific political movement.
Intersex people aren't a monolith. What size gametes each intersex person produces determines their sex. This is the biological definition and is not a spectrum. It is binary and immutable. Gender activists are trying to shove gender into inappropriate places.
If it doesn't matter, then it should be no big deal to drop all of the gender woo when speaking of sex, right?