> the majority of the public

This requires some citation or justification.

Diagnosis is not a criminal conviction in a North American court of law. In particular, reasonable doubt -- particularly among casual, non-clinical, self-deputized jurists who don't generally have any insight into the patient's chart, let alone medical qualification whatsoever -- is not a sufficient justification to withhold diagnosis.

In your post, you are leaning a bit too heavily on vibes to do the heavy lifting in making your points. For example, you claim there exist people with epilepsy who prefer to be labeled as autistic, but you don't say how many people are doing this, why they are doing this in a way that doesn't strawman, nor why this is even topical.

My interpretation is that you are hoping the reader will have specific visceral (vibes based) reactions to these facts and the drama of the spectacle you've described -- e.g. "yikes, some morons are conflating correlation with causation/identification and using that faulty reasoning to claim a diagnosis they don't deserve". Please correct me if I'm misrepresenting what you are trying to communicate, it is not my intention

My suspicion is that this is a tiny number of people to begin with, and not an indictment of autism diagnosis in the way you believe it is. In fact, most of the people you seem to take issue with are self-diagnosing. What specific "methodology, diagnosis, and relevance to every day healthcare" are you taking issue with then?