It's called a spectrum because there's a range. Some people are further out on the spectrum than others. Some people are autistic in one way but not another. One form of autism might be absolute pitch (distinct from perfect pitch in that you can hear semi-tones; Jacob Collier has this but might not choose to describe it as autism). It is a spectrum.
My point was that we are all somewhere on the spectrum. I don't pretend to be able to identify with anyone else's mental state, all I can narrate are my projections and the projections I receive back from others.