Can you post the stats that says they don't? Stupid question. As usual... ya'll completely miss the point. Is DOES NOT MATTER. Barnes is NOT going to change up his defense, period. The "zone" was an example of what other coaches do to "mix things up". Barnes does not and WILL not do that. Get it now?
From my observations the majority of high level athletes in all sports know their strengths and are confident in their abilities such that they believe their best stuff is better than what their opponents have to counter with. JMO