Because how hard is it to stop for pedestrians?
German automotive magazine AMS recently tested out the pedestrian detection systems on a wide range of automobiles. This feature is designed to automatically locate pedestrians and apply the brakes. In theory this keeps distracted drivers from hitting people, but does it really work? A Nissan Qashqai, Mercedes-Benz C-Class, Subaru Outback, Volvo V60, and Volkswagen Up! were put to the test to find out. Only one of the six cars passed.
One of the five cars failed in spectacular fashion. To see which car does what you'll just have to watch the video. Remember: Look both ways before crossing the street and don't trust robots to save you.