Personally, I found this example really helpful to wrap my head around jobs to be done theory.
It switched their frame from trying to innovate on the milkshake itself to the whole experience. Instead of making the milkshake chunky or thick or sweet or whatever they move the milkshake machine up closer to the door so people can be in and out faster.
I'm curious why you didn't see it this way. Did you miss something, or am I missing something?