An individual's sex condition *
coincides* with the type of gametes it produces. Gametes are used to determine (in this sense, ascertain) sex because it shows the reproduction
strategy.
> which is ( counts slowly 'cause can't understand stuff real good ) one, two, three buckets.
Humans are not hermaphroditic, no mammals are. Not sequentially, not simultaneously. (In fact, the way that sex development occurs it cannot happen, but that is going to be too high level for this discussion, clearly.)
> Gametes (egg or sperm) can mix-and-match with other sex markers—commonly, chromosomes, genitals, sex hormones, and secondary sex characteristics—to create a mosaic of sex traits.
Traits do not define sex, gamete size does (see above), adding them all up will not change that.
> People can have both ovarian and testicular tissue (an ovotestis or gradation of cells)
And only one reproduction strategy, which is why there are no human hermaphrodites, having both types of tissue does not mean there is possible gamete production, as evidenced by the total lack of any actual hermaphrodites in all of recorded human history, if not a knowledge of the process itself.
> People can have ambiguous gonadal tissue
Completely irrelevant.
> It is common for all types of gonads (female/male/intersex) to lack gamete production
Also irrelevant. Someone who has finished their fertile phase still has a reproduction strategy in place. Someone who has a disorder still has a reproduction strategy in place. Someone who is not disordered and still in their fertile phase yet not producing gametes right now still has a reproduction strategy in place.
There are only two reproduction strategies in humans, and only one in any individual, and only one is possible in any individual, and it cannot change.
> Maybe tone that down a notch or three.
It was an accurate observation, which you have only gone on to prove further.