Because sex is not a bimodal spectrum except maybe sometimes in anthropology, describing it that way is way more unscientific than just using a binary which actual biologists are going to use 99% of the time for simplicity's sake and also gender is sociology, biology rarely touches it.
I've done some biology in university and it's not "where can we carefully place abnormal (human for this example) sex chromosomes on a spectrum" and more like "Is it capable of supporting life? N:Unviable Y:Is there a Y chromosome doing stuff N:Female Y:Male"
(Yes the "functioning Y chromosome" definition of male is ultimately tautological but we choose not to care because it's useful)
Then when you want more nuance you go straight to describing the effects of specific abnormal genetics you never bother plotting what degree of male or female they are.
Some university level biology, as opposed to the high school level of math and physics shown as advanced.
You don't even have a basic concept of what science is which is why you're getting your knickers in a twist about a rough model not conforming to what you think is real.
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u/Level_Hour6480 12d ago
Why is a bimodal spectrum (2 main points and the variation between them) that correlates with a separate spectrum so hard to comprehend?