Last I checked it cost more than a $100,000 (on average, in the US) to raise a human to the point where they have sufficient control over their behavior and bod

Last I checked it cost more than a $100,000 (on average, in the US) to raise a human to the point where they have sufficient control over their behavior and body that they could be trusted to safely drive a several ton vehicle. Humans have the biology for visual systems, and constant training, and it still takes us almost a decade to fully process distance properly. (This is why children will run in front of moving vehicles--they can't actually tell how far away they vehicles are.)