Enquiry:
We're at risk of venturing into discussion more appropriate to JetBlast than here. What you are saying about the condition being a spectrum is quite true, but with different implications.
Many of us believe the criteria for this diagnosis have been expanded well beyond what was originally described, both for children and for adults. Whether that is a good thing or a bad thing is subject to opinion.
Unfortunately the aviation authorities only have one pot into which all these cases are dumped, and become subject to their rather strict rules of eligibility. That's why this has become such a frequent area of conflict for fliers.
Perhaps it is time for a comprehensive review of the condition and its aviation implications. I'm not so sure there is a will for it yet.