Oh I am not saying that they are there yet.
They have a long way to go and AFAIK there are no autonomous driving cars yet, the human driver should still be alert and have control.
So when you say drive into a tree, where was the human driver ? Darwin award ?
In the long run I am convinced that autonomous cars will be much safer than human driven cars and able to respond much faster to sudden events as kids crossing the street.
IMO one of the worst possible conditions to test autonomous cars is with a lot of human drivers around, I really don't understand that they allowed this , esp. when you read the other topic how for instance Tesla develops its software, ouch.