Actually humans are fairly good drivers. The average US driver goes almost 2 million miles between causing injury collisions. Take the drunks and drug users out and the numbers for humans look even better.

Incorrect. Humans are fairly good engineers, so cars are pretty safe nowadays.

If you include minor fender-benders and unreported incidents, estimates drop to around 100,000–200,000 miles between any collision event.

This is cataclysmically bad for a designed system, which is why targets are super-human, not human.