As a potential autist, I think everyone is autistic in one way or another (which would make everyone neuroytpical, lol).
In the end, maybe we are just all unique individuals with our character sliders set in various forms.
Bimodal distributions exist
Yeah, no. Autistic people pretty reliably score high on a set of diagnostics test for example, whereas others do not.
For ASD 3 and 2 it's even easier to see it's not "everyone".
This line of thinking diminishes the real struggles autistic people face. Not everyone is autistic, and it's not just a quirky set of traits. I do believe society could be better arranged for people who for whatever reason don't conform to the overculture norms, so we could talk about disability along the axis of how society privileges or disadvantages certain individuals.
The concern is that autism as a rigorous category may be useless, but that doesn't mean that autistic people are suddenly neurotypical -- a term that is more politically than scientifically oriented. People who are not autistic broadly are allistic, to be precise with language. They may be neurodivergent in other ways.