Between driving a train or everyone driving cars, there’s a subtle difference between expecting everyone to do so individually or expecting a few to do so professionally.

I would not trust autonomous cars for the coming while. If Tesla cannot make autonomous cars work in a tunnel, built entirely for Tesla cars, used only by Tesla cars, then I doubt that within my lifetime, we’ll see autonomous cars become good enough for the general public. And even if they do, they’re one computer bug or cyberattack away from a motorway pile-up. And you can bet your ass that a driver in an autonomous car will doze off when he’s got the chance, so you cannot trust everyone to drive a self driving car.

Besides, autonomous cars still have almost every other problem as regular cars. You still have two tons of steel, glass & plastic for one person to move around, supported on rubber tyres on asphalt, which is noisy, energy-inefficient and an absolute space hog. Now it’s not the owner calling the shots as to where & how the vehicle is going, but a black box.