Re: Its the edge cases
The edge cases include all the things that go wrong with human beings, like the jerk the other day who was too busy talking on her phone to bother to stop for a roundabout (thank you assistive braking), the two of them this year who have come off a bend near our house in broad daylight with a dry road, and the couple of thousand a year that manage to kill someone. Alcohol, cocaine, psychopathy, inattention, overconfidence, stroke, heart attacks, anger management issues are all edge cases that require no computer and are relatively common in people.
When it comes to cars, the biggest single risk is the you (or me) getting in them to drive them. Once the technology is properly developed, I would far rather trust it than the typical human driver. As I approach the age of 70 I think it can't come too soon for me.