Belz...
Fiend God
As the article says, both sex and gender are a lot more complicated than is generally believed, and are both a spectrum.
It's not an article; it's a blog. An opinion piece.
And the only reason why sex and gender are distinguished is because of the recent change in definitions. Prior generations understood the two to be synonymous, effectively. Of course, when you change your definitions, the data you have will lead to different conclusions; that's a given.
As for a spectrum, well, not really. If a tiny percentage of the population cannot be identified as one of the two classic sexes, it doesn't upend the entire conception.
I honestly have no idea what this drivel is supposed to mean but, judging by your past body of work, I'm assuming it's both ignorant and bigoted.
Allow me to translate: the view that gender is fluid or a spectrum being biologically supported is incompatible with the previous claims that gender is whatever you feel you are. It can't be both.
As an aside, calling people bigoted every time they disagree with you on a topic like this reflects poorly on you, not them.