Comment by timster6442
7 hours ago
I agree that these cases are ridiculous to blame on the waymo entirely, but to give logic to their reasoning here you're unsure if on average the 1.3 fatalities per 100 million miles (FPMM) may also be on average ridiculously not the drivers fault as well. Perhaps if you were to throw out all ridiculous cases you'd have an average of CDL's having a 0.3 FPMM vs Waymo's having 0 FPMM.
The nuance you describe at the end is the better interpretation: fatalities per mile driven is a useless metric since it's such a rare occurance and incredibly circumstantial that it cannot be used as a meaningful comparison metric for safety.
It also gets better depending on the medical services nearby and there competence. So having more competent medical services in cities, lowers murder statistics and car-fatalities. Thus the actual accident rate would only be visible in the countryside.
If we want to get closer to the "real" number, we would also need to account for mechanic failures of the car, wildlife, and suicide. We don't usually attribute people jumping in front of trains as the fault of the person driving the train. Fatalities per mile driven may very well be biased in favor of waymo that has nothing to do with safety of drivers, which in turn create uncertainty when trying to estimate the statistical result of making all cars Autonomous. For example, car owners can have a higher variance in maintenance than waymo, they can use the car in areas with more wildlife than city traffic, and they can commit suicide through other means than personal being behind the wheel (suicide statistics is itself quite complicated).