> Human beings have no business driving
I agree (I hate it when I have to drive). With robo-cars, there is another problem: Lots of traffic laws are routinely and massively broken. In .de (and probably everywhere), the law fixes a minimal safety distance for different speeds and types of road - and the real distance that the drivers keep is a third to a half of that. This is not just bad behavior - tripling the distance would cut the capacity of the road to a third (unless you triple the speed as well, which would not increase safety either), and there are just not enough roads for that (one would need three times the area for roads as well).
Now, if a robot drives a car, he has two options: Follow the law, cause a traffic jam behind himself (or even provoke somebody to cut into the seemingly extremely long clearance) and be hated by everybody; or drive like everyone else and be sued out of business if something bad happens.