Swiss Re, one of the world's largest insurance companies, says Waymo's self-driving cars are already safer than human driven cars.

Well, not holes but significant caveats :

• testing has taken place on a tiny subset of American roads
• there is some history of dishonesty in the self driving industry

So, giving them the benefit of the doubt, Swiss Re are right - but there are externalities that constrain the value of the results.

"....some critics have questioned whether the cars have been on the road long enough to begin making fair comparisons to human drivers. For example, Waymo’s driverless cars have traveled roughly 4 million miles, but traffic-related fatalities are routinely measured per 100 million miles. Across America's roadways last year, there were 1.37 fatalities for every 100 million miles traveled, totaling 42,795 lives lost in vehicle traffic crashes, according to the National Highway Traffic Safety Administration. Each year, human drivers log more than 3 trillion miles on the road.

“It’s interesting that we were able to show statistical significance with so little data,” Victor said. “That has to do with two things: one is that we have very robust baselines from Swiss Re, and the other is that we have incredible safety performance.”

Waymo did not release the raw data it used to come up with its findings, saying that information is “proprietary.”

"The information they released is the results of the study rather than all the details," said Steven Shladover, a research engineer with the Berkeley's Institute of Transportation Studies. "Of course, as researchers, we like to look more at the details and the methods for the analysis."

Shladover said he was also "disappointed" the study grouped its findings for both San Francisco and Phoenix instead of sharing separate data points for each city. While Waymo's study only offered combined figures, it examined different time spans for each city: Waymo's Phoenix data spanned more than four years (March 2019 to Aug. 1, 2023), while Waymo's San Francisco data incorporated less than two years' worth of driving (March 2022 to Aug. 1, 2023), according to a Waymo spokesperson.

"It lumped them all together and those are quite different areas," he said. "I think it would have been more interesting to see a comparison for San Francisco and then a separate comparison for Phoenix."

Leaders at Waymo and Swiss Re said they plan to eventually submit their study to a scientific journal so that it can be independently reviewed, however, neither company would say when that might happen." Source

mmm, Swiss Re have been in the insurance game since 1863. I'd go with the idea they know what they're doing.

Self driving doesn't have to be perfect to be safer than humans driving.