Can you pretty please stop pressing me on this point?

The thing is, you just accidentally punched downon a vulnerable group. Autistic people constantly struggle with people perceiving them as robotic types who can't appreciate art and stuff (it's not really true at all).

If someone said "it's very niggerish", you'd understand the offense, right? It wouldn't be acceptable if you didn't really mean "niggerish", just traits stereotypically associated with the group being slandered.

So don't use "autist" as an adjective for things that are not in any way autism. It's harmful/hurtfull, and the fact that you basically keep defending it without really realizing what you are doing is why it is not being let go.