What mechanism do you suggest for a genetic predisposition for interest in a technology that was invented in the last handful of generations? How could there possibly be a "car gene"?
There could be a predisposition for males to be attracted by noisy or fast moving things, because that is what they will have to care about when they grow up, in a hunter gatherer society. Have you seen kitten chasing things? They are obviously predisposed to grab and chase and their early games prepare them for hunting in adult life. There could be a "car gene" as much as there could be a "play with a doll" gene. Wishful thinking cannot remove such a possibility.