The thing is - safety is relative. And meat-ware drivers are absolutely terrible. It is not a high bar to make a robot driver safer than a person.ps... the only people I know who think a self driving Tesla would be safe are non-programers. Ignorance is bliss.
I don't know the relative injuries per mile comparing robot drivers with human ones. The technology may, or may not be there yet, but if not, then it will be. Robots will be so much safer that it is not massively far off that actually driving the car yourself on public roads will become illegal.