This is drifting off topic, but... you're advocating for being constantly alert while the car drives itself? Doesn't this have the same cognitive load as driving, with possibly the additional time needed for "flexing your muscles" to regain control of the driving wheel?

To me, self driving means that I can not care. If I must pay attention to avoid being killed, it is at most some glorified adaptive lane keeping and/or emergency braking. That's nice to have, but it's not self driving.