Those instructions are very specific, whereas Disney's leave room for anyone to apply.
"
DAS is one of our programs offered at Walt Disney World theme parks intended to accommodate those Guests who, due to a developmental disability like autism or similar, are unable to wait in a conventional queue for an extended period of time.
Guests may have a conversation with a Cast Member to determine eligibility for DAS via live video chat. There is not an in-person option to request DAS Registration." (emphasis added)
Disney could easily have said that it was only for guests with autism or similar, and that only guests with developmental disabilities could apply...they didn't.
So yes, if someone who feels they need the DAS won't call, that's on them.