There's plenty of evidence if you care to look. My severely disabled daughter has spent over 10 years on waiting lists for state assistance. If my anecdote is

There's plenty of evidence if you care to look. My severely disabled daughter has spent over 10 years on waiting lists for state assistance. If my anecdote isn't sufficient for you, the history of accommodation misrepresentation at Disney theme parks and the reduction in services Disney had to impose to curb rampant abuse makes an interesting read. https://disneyparks.disney.go.com/blog/2013/10/guest-assistance-card-program-update-for-walt-disney-world-resort-disneyland-resort/ https://disneyparks.disney.go.com/blog/2013/10/guest-assista... http://babesindisneylandblog.com/my-thoughts-on-the-disabled-tour-guide-scandal-and-guest-assistance-pass-abuse/ http://babesindisneylandblog.com/my-thoughts-on-the-disabled... My take on why accommodations were not expanded to different diagnoses is that there is, rightly or wrongly, a perception of lesser severity with a diagnosis of PDD-NOS or Asperger's that would stratify the level of services available. And since people always want more, you'd have ended up with more push into the "autism" category anyway.