A car is safe when it's used correctly, and all the other cars on the road are used correctly, and all the people and animals near the road behave correctly, and the weather behaves correctly.
It was in fact the whole point I was making that it's generally not possible in the real world for a human to consistently use a car correctly. That's why I don't care about statistics for autopilot 'when used correctly'. I'm interested in autopilot as it gets used in the real world.
