To add perspective, the interim solution (driving yourself) is probably closer to three 9s. So it's a choice between a big improvement soon, or an even bigger improvement later.
This is not a condemnation of technology augmenting driving. ABS is clearly a win, airbags were once controversial, and even seat belts were once considered questionable. The technology will likely improve, but it isn't there yet and believing that it is can quite literally kill you.
So, until there is clear data to the contrary, I'm sticking my original assertion that current-gen augmented driving technology improves safety.