5x5 in the Max phase

What I don’t understand, is why some people like lou simmons will attribute “missed lifts” to muscle weakness (i.e. training triceps, lats, and delts to increasing bench), but from my experience most of my missed lifts have been attributed to a worn CNS from too much heavy lifting too often. People just do not realize how valuable it can be to just drop the volume off the table and carefully regulate how often and to what degree u “fill up the cup.” Many people just cant wrap there head around the fact that one can put 100 pounds on their bench or squat and not gain a pound of muscle in the process. I was someone who used to be guilty of misdiagnosing this problem