If this were only a human psychology problem, someone would just dump a fleet of self driving cars on the road and prove they have the tech. The rewards are too good to ignore and surpass any potential fine/regulation, if the tech is good enough.
But it’s not there yet, it might never get there. We’re so far off general AI it’s unreal, e.g. a human can drive a car with a single eye open, and one hand on the wheel, and another on a throttle- all from the drivers seat. Even with sensors and data coming in from all over the car, AI can’t manage it.