Are you really scaling off a single data point? I feel like you'd also have to compare the types of driving. What is the death per 100 million miles on a city street? If you exclude highway miles I'd imagine it's much worse.
It is the only data we have. Ironically, one reason for the paucity of such data is that these companies have been so reluctant to make public their records—the reason this accident occurred in Arizona and not California is because Arizona has relaxed reporting requirements. And the commenter notes that extrapolating might not be wise.
Are you really asserting your statements without any fact whatsoever?
