The auto/manual difference seems related to: "debugging is twice as hard as coding" and argues for a self-driving car model that is fully automatic, and would

The auto/manual difference seems related to: "debugging is twice as hard as coding" and argues for a self-driving car model that is fully automatic, and would pull over and stop if it cannot cope, rather than an assisted/monitored model that is mostly automatic, except when problems suddenly arise, when it might toss the intractable issue (and control of a moving vehicle) to a previously more competent driver. ("Hey, human, it's suddenly snowing, and I'm losing traction, take the wheel, now!")