i don't think you fully understand how many edge cases there really are, and the full range of conditions people here expect autonomous cars or even driver assist systems to function in.

As a very simple example, i sat my driving test in the Netherlands. Literally the first thing my driving instructor taught me was that tires have finite grip and that changing speed or direction requires grip. Doing both at the same time, as you do while driving along a curved highway off ramp can be very dangerous in slippery conditions.

Many, many times, the auto braking and lane centering system in my hyundai car has caused the car to skid in light snow. i have lost count of how many times this has happened. With my previous "non smart" car, this never happened because i know how to drive in the winter.

Respectfully, not all driving conditions and styles are dangerous.