For the average driver who's on their own cellphone instead of doing "defensive driving", the system will do better than them. Professional drivers will still drive manually. Most people aren't professional drivers. (A reverse computer-to-car-analogy: most people don't know enough to know what programs are safe to run. Better something like SmartScreen/GateKeeper for most people. Professional computer users can "drive manually." But don't force everyone to do it, just because you want the option. They'll suck at it.)