Half the population has an IQ below 100. The people writing software for self driving vehicles are one or two standard deviations removed from them. I don't equate higher competence to godhood, but my life experience gives me a lot more confidence in software than people with IQs below 100 that can't pull their eyes off their phone while they drive. Or that drive drunk. Or fall asleep. Or go too fast in the rain. Or focus on the radio at just the wrong moment. Or a few million other dumb reasons people wreck cars and injure and kill innocent people EVERY year.
The status quo is like inflicting the casualties of the Vietnam war on the country EVERY year. Madness that anyone doesn't want to see it improved.
Aberrant behavior is not related to intelligence quotient—if indeed that is related to anything. And again, automation is not foolproofing.