On thing to keep in mind is that the nature of the miles driven when autopilot engaged are not the same as the ones without autopilot (ie mostly highway miles vs city street driving), and likely also different from the miles driven without active safety features.
Agreed, those numbers alone don't convince it's safer.
Also, personally I would have a complication: would I be satisfied with being safer than average? I don't know if I'm average. I tend to pay attention and never have driven under influence (alcohol or w/e), or when sleepy. So a little better than average would not bring me peace of mind.
I think some kind of situational statistic would be relevant here; maybe they could have some part of the fleet as controls with AP disabled (and offer some kind of reward), then the overall accident rate can be compared better.
My intuition was always that autopilot + human would be safer, and the only thing that made me question that was the soggy toast Tesla provides as "proof".
There would be privacy concerns doing an apples to apples comparison, but people could opt in.
