It involves human behavior. Economists are doing the same thing that psychologists or NLPers are doing. They try to identify meaningful units of economic behavior and construct the rules that relate these things together. If that does not happen, they refine their models. John paints with a larger brush than scientists.
Scientists have other concerns.
They have to exist with in a paradigm of keeping their jobs at unversities, publishing, and so on. According to Kuhn, a paradigm is the rules that govern this type of behavior. John chose to simply let his own personal observations and descriptions be OK without constraints. He reasoned that he was exceptionally good at observing human behavior and that his observations and descriptions would generally be useful. Were he to constrain these observations within the paradigm of cognitive psychology, he could spend his whole life on one aspect.