This is the advantage of self driving. If there is an error it gets fixed for all cars in the fleet. Humans have bugs - we get bored, we get distracted, we get angry, we thrill seek, etc - and we’ll never fix our bugs. Nor should we. Any technology that requires humans to be perfect all the time to be safe is an inhuman technology. I think people will look back at fully human drive cars, and the death rate we tolerate from it, with disbelief.