This is a problem. Assertions become adopted because they support a desired action and become accepted fact. Then even when better, more descriptive theories come along, the old ideas are impossible to budge. In the case of real science, look how quickly the luminous aether, Newtonion mechanics and other outdated models were replaced (even in the face of strong opposition often). For comparison, Keynesianism is stubbornly holding on in the face of almost overwhelming circumstantial evidence of its abysmal failure.