As much as many might believe that moral outrage drives policy, the reality is that in the US, industry drives policy.
The transportation industry is powerful, and the transportation labor force is incredibly weak. I think we'll see the national government push for accelerating autonomous vehicles long before we see them push for banning them.
I think autonomous vehicles mean there won't be a transportation industry, per se. There would have to be some barrier to entry that's not readily apparent now. After all, "Uber for self-driving semis" under an Amazon style aggregator ...
Why are you then confident that safety numbers will carry the day? When someone is killed by a driverless car, that's going to be an emotional issue, and the appetite for cold hard data may be limited.
If safety numbers were really what people were after, it's hard to see how the US would have the gun culture that it does.
Engineers put far too much faith in data, and it's why they're often so bad at politics. Look at the incoming president; what people want is frequently more important than what is.
The upshot of what I read was - these folks are, in effect, test pilots whether they know it or not, and even a good driver could have died.