If an assistant coach is not producing and the head coach decides to keep him on staff... then ultimately it 100% falls upon the shoulders of the head coach then.
This is no different with ARod. Only that's not the place here and what's going on... there is a certain group here that believe ARod can't do anything wrong and ultimate are passing the blame onto others to protect ARod. If Kalani decides to keep ARod and we continue to be mediocre at best on offense, then ultimately Kalani owns that because he decided to do nothing about it.