Notice it says one fatality per "320 million miles in vehicles equipped with Autopilot hardware." But, how many of those miles (or what percent of the time) does a Tesla driver use Autopilot? Also, maybe those good stats are due to the structural safety features and not the autopilot. It may be more fair to compare to other cars with excellent crash protection but no autopilot.
I think it would be a great service to the world to improve driving safety, but maybe we need to really start looking at the stats and get some more hubris as we transition to full autopilot. For example, require that drivers keep their hands on the wheel and eyes on the road. When more cars have autopilot, then mesh behavior between vehicles, and e-road features, then maybe we'll be more ready for driver-less cars.