Let's see a self-driving car win a Formula 1 race--and even that controlled racetrack environment isn't the same as the real world! It's actually harder to drive on the typical American roadways than it is to be on a track.
And yes, I am aware that AI stuff is improving exponentially or whatever, but the more I think about this, the more I think it is mostly a pipe dream to grab headlines and be a "look over here" type distraction for the purposes of raising funding.
In terms of safety, people will still lose their lives, they will just die from different kinds of car accidents than the kinds we have now.