* Better sensors - ~10 cameras around the car vs 2 cameras on a limited gimble.
* Very high consistency - Speed, distance from other cars, optimal stopping distance from a switching stop light, better speed/distance estimation of other entities (eventually)
* No distractions - a computer will never drunk drive / look at their phone / argue with the passenger / have road rage.
IMO These advantages will out-balance the very rare ambiguous soft situations a computer will have a hard time handling, let's say a custom written no-entry sign or a cop waving their hand.