thing is they jury-rigged all their explanations around the concept of dysphoria (first with the horrifying case of the Reimer twins, then to explain those who had surgery and hormones to actually do their best to switch sexes)

but the categories of "cis," "agender," "genderfluid," "nonbinary" are all basically all synonyms for "doesn't have dysphoria": there's no consistent way to separate them, the hivemind just went "that sounds right" to each boiled-down, Gender Studies 101 definition