“Will the Asian robotic cars be the worst drivers?”
The electronic control components will be sourced from China. That should take care of it. :)
What happens when you are driving down the road and your kid flips the US/UK switch?
Cars are not planes. Autopilots work because the environment that planes fly in is very forgiving. There are very few "hard things" in the air to collide with because the sky is huge and 3 dimensional.
Cars operate in 2 dimensions. It is a much more complex environment. When 2 cars pass each other on a two lane road and miss each other by 4 feet(which happens millions of time per hour) that same thing happening to two aircraft (getting that close) would be a near miss requiring FAA and NTSB investigation.