I think the point is that each person is a whole. A diagnosis of any type describes only part of a person. There is so much more.
You hear here, that when you've met one person with autism, you've met one person with autism. We are all different. We don't want to be labeled (and often dismissed) as autistic and all that implies to the NT culture.
I used to work in an emergency room, which can be pretty hectic at times. In that environment, where patients are very temporary, nurses and doctors will refer to: "the chest pain in room 16" labeling patients by what brought them in to the ER. I get that. We didn't have time to learn names and what we had to attend to was the emergency that brought the person in to the ER.
It isn't just autists who feel this way. People in the developmental disability community don't like to be labeled by their "diagnosis" either. One of the greatest joys in my life has been learning to know and love so many people with so many disabilities who mostly passed by in life. Others do not know what they are missing.
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The cry of the lonely loon, coyotes hollering at the moon,
Wind rustling through the trees, that's the Canadian breeze.
Smoke rising from the fire up to the trees in stately spire
reach for the sky in the evening glow, Sun goes down no north winds blow.
My heart has but one home, from which I'll never roam,
Land of true happiness, Canadian wilderness. -- Voyageurs Song