If it is true that Tesla will - by design - not try to stop in front of a stationary obstacle that should not be on the road, I don't understand how come Tesla

If it is true that Tesla will - by design - not try to stop in front of a stationary obstacle that should not be on the road, I don't understand how come Tesla autopilot and similar self-driving techniques are not immediately banned. Every driver knows stationary obstacles can and will appear on the road.