Cause and effect are impossible to determine from these statistics. Obviously, very few players had numbers reflecting the hypothesis. Because defenses will have figured out how to play them, and their teams will have had to find a way to handle that defense. If an opponent is going to shut down the main threat, then it knows how to get other teammates involved to maintain the overall team offense. We debate whether to shut down a main threat or his teammates precisely because the answer is not clear.
Teams find their way of handling the different strategies.
TV commentators will describe this in different ways. Sometimes they will preach that a star has to get a lot of shots. Sometimes they will preach that a star has to get their teammates involved. Sometimes, they will insist that a star should be taking the shots only when his teammates are struggling. Bill Walton will say whatever floats through his drug-damaged head at the moment.