With flying cars we'd have the opportunity to take the human factor out of the equation, which is the cause of the vast majority of car crashes.

Imagine we had never invented cars and trucks and highways and were just doing it now. Do you think we'd take these two ton death machines and say "let's put them under control of an individual person, with all the distractions and fallibility and other problems we know we suffer from"? Or would be instead design a system where every single vehicle has a computer that is constantly in communication with all the other vehicles around it, and can react far quicker to any issue than a person could.

The problem with self-driving cars is that they have to operate in a world where there are also human-driven cars, and cyclists, and pedestrians, etc. If the only things on the road were computer-controlled, it's a completely different scenario. And that's what we'd have with flying cars. At least I hope so!