Humans have an average of 1 fatality per 100 million miles driven. No one is anywhere close to 100 million miles without intervention.

Are there any fully autonomous cars on public roads with no driver that can intervene? Seems like only maybe in tightly constrained situations are we ready.

I don't think I mentioned FULLY autonomous cars, my point was: something doesn't have to be perfect before we have to use it, but I probably didn't express myself correctly

I think that the necessity of intervening drivers atm indicates that we aren't at that point yet, even if that point is far from perfection, and also that the reason any self-driving cars are on the road is because of the fairly loose but significant requirements from regulation. We might be at that point in otherwise very dangerous situations, like if I was very tired or drunk, but otherwise I don't know that I'd have so much faith in software engineers to completely control my car.