This strikes me as an overly simplistic concept. The problem with that quote is that it assumes that the enemy has not applied any critical thinking to their tactics, that they do not observe what has worked and what has not or that they do not do research to determine what tactics that they will use. It would be nice to be able to assume that our enemies do not apply critical thinking, and in fact, some of them clearly do not. But some clearly do. Our enemy has proven on multiple occasions that he can be cunning and adaptive. Failure to consider that will, inevitably bite us in the back. I'm not sure just how useful quotes like this are.