> Maybe I'm missing the takeaway from the driving decisions.

I think the point is that for autistic people, a lot of things in their day-to-day life that randomly happen and can't be controlled for, can be the equivalent of just, random people walking by and punching you in the arm all day.

Each individual punch might not hurt, and describing the incident to a neurotypical person is probably met with "Eh, that doesn't sound that bad". An entire day's worth leaves you with a pretty sore arm though.