There is no ‘the computer’. Planes, and probably the car, have a LOT of computers. One can fail, several can fail, and the plane is still controllable. The probability for more than one failure to take out a plane is astronomically high. I am not just saying that. In the avionics industry we have to do the math and KNOW how likely is for something to completely take out a flight critical system. Is the Google car developed to those standards? Can they prove it? I highly doubt it.
Politicians/bureaucrats are much smarter and more honest than ordinary peasants.
Most of present day cars are controlled by the ‘computer’.
ABS, steering assist, Stability Control, throttle, braking ...