Well they are nowhere near human drivers. And yes, human drivers are terrible. Thing is that human drivers vary a lot. So we have excellent drivers and we have

Well they are nowhere near human drivers. And yes, human drivers are terrible. Thing is that human drivers vary a lot. So we have excellent drivers and we have awful drivers. And also we have tired drivers, bored drivers, angry drivers and we have sporadically inattentive drivers. If we were to aim for "at least the same number of accidents as a human per mile" that would be a pretty disastrous AI. Because the AI would be much more uniform in its performance. A human driver will send text messages and won't even slow down before hitting a stand-still truck right in front of them. A human driver will mix up the brake pedal and speed straight through an intersection. An AI that does comparable damage (obviously wouldn't make the same mistakes) would be pretty darn scary to sit inside or be near. There is also the very important factor that a self-driving car needs to behave as a human to not cause accidents just with it's presence. The PR disasters that await, when people die because a self-driving car did something that a conscious human would never do people won't react rationally. Tesla are just begging for a, well deserved, ban on self-driving cars and attach a stigma to them. All while killing some people. There is no silver lining to it.