The short sightedness of this kind of comment just to beat the thoughtless rhetoric without solving anything.
Self driving happens it's better then the average driver. People start thinking 'I shouldn't leave my car idle I have to hustle, it can drive people while I am at work'. Self driving cars turn into ride share. Self driving cars then start becoming a norm, as investment takes over and they connect to each other driving and braking together. Accidents reduce, costs of transport lower. Fewer people buy cars. Cars work like carriages together like a train but using existing road infrastructure. Programmed by logic based on law pedestrians and bicycles now priority but anyone else can still take a clean private carriage to their destination.
I am totally on board with individual vehicles as a last-mile solution, and self driving vehicles are a great option for that, but expecting them to provide the entire trip puts us right back in the situation we find ourselves now with human driven cars.
Unless we are going to shrink these vehicles down to the size of a bicycle, mass transit for the bulk of the route will always win out in terms of efficiency.