But that is not really necessary if you simply want to know something about the current population. If the cause of the observed difference (if any) is environment or inheritance is really a different thing.
That's where we get into some shady areas. For one, if it's an environmental difference, but only in the American population in 2008, it doesn't even come close to proving that men are better at it (although you might get away with the statement that, currently in the United States men are better at 3D perceptualisation, so long as the rest of the conditions I listed have been filled, but that's a vastly different statement). Similarly, an environmental distance, even in a worldwide study, from 1970 would be worthless now except as a historical view.
Secondly, if it shows to be a strictly environmental distance, especially one caused because of an environment negative towards women (such as constantly saying that women are bad at driving), then the continuation of jokes of women being bad at driving and the notion that science has proven it okay would be, not only mistaken, but also setting up a self-fulfilling prophecy that I'm not really okay with.
So, yes, the difference between environment or inheritance is a big deal here, even though your first sentence is strictly correct.