Data specific to driving is still quite limited for people, even when counting all that passenger time in childhood. The average driver in the US drives maybe 10-15k miles a year, so optimistically a person may have 200-250k passenger miles before driving? Consider that Waymo's cars drove 3 million real world miles in 2016 alone, and 25 billion virtual miles in a simulation, and all those miles are potentially used in a model shared by all the cars.
Now if you want to just look "total experience in the world as a whole" the numbers look a bit different, but if anything that just accentuates the differences here. We don't currently have a way to teach computers to construct mental models of how the world works the same way humans think about it, which would be necessary to use training data that was about the world as a whole.
Now if you want to just look "total experience in the world as a whole" the numbers look a bit different, but if anything that just accentuates the differences here. We don't currently have a way to teach computers to construct mental models of how the world works the same way humans think about it, which would be necessary to use training data that was about the world as a whole.