When I said rational I meant it in this way. That rational agents will perform in a way in which maximizes their utility (or reward function). In psychology we call this theory homo economicus[1]. Regardless of theories of value, perceived rewards, and utilities, human beings have biases, prejudice, superstition, dogma, etc. etc. In real economies these non-strategic behaviors are consistently observed. This is why I say that economics are not just game theories, they are psychology, sociology, religion, as much as they are zero-sum games between actors.
reply> Hard to call such actors rational, but that does not stop as from studying them.
This is precisely why I object to your first post. “Shut up and do the math” has not done the wonders which string theorists had hoped. Game theory is a perfectly fine way to mathematics, and to study certain strategies, but it tells us nothing about the nature of economies in the real world.