Actually, when I was in school, cue in the line about the stone ages, we played more man than zone. Jb always thought of himself as a zone expert but we played a lot of man.The zone is good when it gets turnovers. We get turnovers by having long athletic teams to intercept passes.Small guards are not a fit for the zone if you are going to play it 100% of the time.
The problem with the zone is we play it 100% of the time we aren't pressing. If JB mixed like 5-10% man to man into the D when the zone struggled it would give the team a chance when the opponent was hot.
JB saying our team can't play man to man is just him defending his decision not to do it. We played zone throughout his career but until 2010 he would sprinkle in some man to man. He refuses to do it now even if his personnel don't fit the zone. That isn't smart.