For one, "better than average" is hard to measure / subject to lots of confounding factors, so people (rightfully) find those claims hard to believe. For anothe

For one, "better than average" is hard to measure / subject to lots of confounding factors, so people (rightfully) find those claims hard to believe. For another Autopilot often fails in different ways than human drivers, so it's easy to find examples where a human driver would have been fine, which exacerbates the perception that these are not in fact better.