There are dangers to assuming autistic people need routines, without understanding why. Routines imposed by other people are likely to do more harm than good.
“If the dynamic of autistic burnout really is related to spending more resources coping than one has, I’m not sure the real leverage in avoiding burnout resides with the autistic person alone.”
I believe that the best way to understand autistic minds is in terms of a thinking style which tends to concentrate resources in a few interests and concerns at any time, rather than distributing them widely.
Full normalisation of autism would require a substantially broader concept of ‘normality.’ It would mean acceptance of autistic people who are non-speaking, an understanding of meltdowns, and general awareness of the dangers of sensory overload.