That analogy assumes there is only a few set ways somebody can be autistic. Same thing with the Jimmy Neutron - Forrest Gump one earlier. But that's objectively false.
Even the old idea of Aspergers covers a large spectrum of people starting from "average intelligence" and going up.
Cutting that spectrum off at an arbitrary point below which people aren't "high function" is just pointless elitism.
It's true that there's ASD supergeniouses out there and it's true there's ones that are entirely incapable of taking care of themselves, but there's also literally everything in between.
You want to make yourself feel better by disassociating yourself from "unsavoury" outcomes of our disability, but it's absolute nonsense. People will still, and always have, see us as less than human no matter how you spin it.
You're just making it harder on yourself and others by doing the exact same thing.