CPJ has often jumped in on this or that position group, defense with Wommack, special teams repeatedly, and so on. It is just part of his management style. He does not micro-manage overall or day to day but makes his presence felt periodically and as he believes it is needed in specific areas. I suspect he has found that to be effective as motivation and for reinforcing his coaches authority with the players even if he thinks they may not be getting enough out of the kids based on closeness and familiarity. Kind of like the mother and father who make use of periodic interventions and shows of stern authority from the dad to help make the day to day behavior of the kids improve.
There is so much psychology and periodic change-ups to management and coaching strategies that go on within a program that a seasoned head coach like CPJ is involved with and capable of utilizing. He is often credited at playing chess on offensive strategy and play calling while others play checkers, but he is doing the same thing in managing 20 coaches and 100 student athletes. I think that sometimes he is playing his chess as regards the program he runs and us outsiders are playing checkers in trying to grasp what he is up to.