I'm not reading a position in what you've said, but there is an observation here to draw out for the crowd. It doesn't matter all that much if after controlling for those variables it is relatively less safe; in absolute terms it just needs to be as safe as the worst human drivers.

That is, we have an accepted safety standard - by definition, the worst human driver with a license. If a Tesla is safer than that, the rest is theoretically preferences and economics.

I'm not saying that the regulators or consumers will accept that logic - if airlines are any example to go buy, they'll take the opportunity to push standards higher - but I think the point is interesting and important. It is easy to smother progress if we don't acknowledge that the world is a dangerous place and everything has elements of risk.