You're claiming "even though Tesla's self driving might be better/safer than human driving today, and will in aggregate save lives over the present state, there

You're claiming "even though Tesla's self driving might be better/safer than human driving today, and will in aggregate save lives over the present state, there's this other approach which could save even more lives!" It's not certain that Waymo's approach will be better, especially at scale (and in cities other than Phoenix). We don't have that kind of data yet. And even if it is better, Tesla's approach is still a pareto improvement over now. The perfect is the enemy of the good.