Simply put, learning history is to understand the past, not to be confused about the past, and to guide future behavior. Such people are rarely confused. Such things as "hidden rules" explain why officials in contemporary China are more bureaucratic than those in other western countries, and why people don't like bureaucracy, but when they enter the system, they become bureaucratic. These things can only be better answered in history.
Of course, because history involves many macro aspects, professional employment will be relatively narrow, all of which are relatively high-end and close to the nature of ivory towers. But if one wants to make a difference in the humanities field, one must have a high historical literacy. Therefore, if you are ambitious in this respect, history is worth learning and should be learned. If you like natural science or have no ambition, study history just to blow water.