If I understood `oneplane` correctly, that's exactly the point. Coal miners are in the energy sector, and cowboys are in the food sector. Whether or not a spe

If I understood `oneplane` correctly, that's exactly the point. Coal miners are in the energy sector, and cowboys are in the food sector. Whether or not a specific worker in those industries will be required may change over time, but the general demand for the output of those industries likely will not.