It is a disorder, and not a spectrum.
The literal purpose of humanity or most species is to multiply and reproduce, thus we get attraction in order to make that happen. If our brain suddenly doesn't get that attraction, and urge to mate to reproduce, then it is an abnormality and disorder. When the majority of a species is programmed to fuck, and your wiring has no interest, or urge to, that's a disorder.
It's not some natural 'oh you're just different,' it literally goes against human nature as a whole.
Unless nature formed it to get rid of some of us from the gene pool, it's a disorder.
And since I've been cursed with having to live with it, I will continue calling it a disorder.