This person has never driven a truck or a bus[1]. The amount of stuff that can go wrong in a truck or bus, plus the amount of damage an error would cause is well above a car.
I think the whole driverless car should have started with smaller-than-car vehicles. I wish they had started with simple package delivery vehicles[2] and learned from them.
1) I did have a bus license in my poorly spent youth
2) something like http://badgerlandminitrucks.com/specs.htm but smaller. Vehicle drives to A, texts, accepts cargo and payment, leaves for B, texts person at B, B verifies ID, door opens, vehicles goes to next site - probably work OK in a city