take his assertions about coaches and put managers (as in a corporation) in the places of the coaches. Now imagine the employees as the players. Imagine you are the owner or shareholder in a company where the managers talk about not being able to do the work themselves, that they have to let employees do it all. Their hands are tied. The company makes mistakes and fails to meet your expectations? It's the employees that failed since the managers can't do the work themselves. Success is so, so fleeting that how can we expect success to be consistent anyhow?
Still agree? Want to make a change in the managers?