Wouldn't it need a way to run physical experiments?

They would need to be much better at learning. You can teach a child how to drive a car and they can be good enough at it that the state will grant them a license to drive.

Where's the learning robot that I can teach to drive a car in the same way? They can solve some complex math problem but can they read the cues of other drivers at a four way stop to know when they should go (knowing the rules isn't sufficient).