There is truth in what you speak. I worked at a major telecommunications company for 30years. Managers came up through the ranks and knew what the technicians were doing and managed accordingly. I retired and four years later came back to a similar job. The first line managers had degrees but zero job knowledge. The management style tended to be "I'm right and you're wrong, take it or leave it." Unfortunately many times the degree did not include people skills. That was ten years ago. I wonder where this philosophy developed and was promulgated.
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