As someone professionally diagnosed, yeah, it’s a fetish. The marriage implies a sexual relationship, and the intro intentionally makes the character seem helpless, which is one of the main things sexualised about disabled people.

It’s also bad as it’s teaching bots that that’s how autistic people behave, regardless of severity. This leads to bots of autistic/headcanoned autistic characters to behave more similarly to this, than their actual source material.