I don't think you meant it, but this response kind of comes across as very ableist... in my opinion. You call yourself an 'able-bodied person' who can only advocate in such a way that says anyone who IS classified as having a disability is NOT able bodied and can't advocate. Simply not true. What you actually need to do as a non-autistic person is LISTEN to autistics and amplify autistic voices (same goes for other disabilities) rather than speak over or for us. There are more autistics than you think in the creative industry alone—many of us struggling to find work or be heard despite being extremely good at what we do.

I also can't help ask WHY are disabled users just not included in testing? Why is this the way it is? Is accessibility not one of the most important parts of good UX? Does it simply mean it's too much of a hassle for an organization to do this (despite claims that they respect disabilities)? Any org that doesn't view accessibility in UX as a basic need has a lot of work to do.