Providing this likely wrong number anchors a value in people’s minds.
It’s actually worse than saying “we don’t know the rate compared to human drivers because there’s not enough miles driven.”
Your other points are valid but don’t excuse poor data methods hygiene.
Even now you are making baseless data on its face because you don’t know the human fatality rate per 3M enough to say is “significantly higher.” Although I think it’s easier to find enough data from the human driver data to match similar samples to Uber. But dividing by 33 is not sufficient to support your statement.
I haven’t seen data on the public reporting. That seems interesting and would appreciate it if you can link to it.