LOL, I can see the humor in your post, but I also know women (my fiance for one) that can take apart and rebuild an engine with nothing but their own knowledge and a set of tools. That doesn't make her a good driver. She is, but thats beside the point. I also know many men who couldn't care less about cars, have never opened their hoods, and wouldn't be caught dead at a car show.
Being interested in cars, knowing how they work etc has nothing to do with driving. You can love football and have no idea whatsoever how to play. You can also be a great basketball player and hate the game so much you dont play. Just because more boys play with cars as kids doesn't mean they're better drivers LOL. Driving is a skill, just like any other. Its the ability to operate an appliance. being interested in the appliance is a totally other, non connected matter.
In fact, boys play with cars because thats what they're taught they SHOULD like playing with, and they're shamed if they're not, but thats an entirely different psychological discussion ;)