If this were a logical world what you say would be correct, however AFAIK there are very few "Vulcans" currently working as machine shop supervisors.
In too many cases, when things are closely analyzed, the actual objectives of too many people in supervision/management [in many organizations, not just the metal trades] is not increased or even maintained productivity/quality, but some sort of personal satisfaction derived from giving orders to others, and increasing ones' status. One frequent example is that the boss hogs the newest computer, even though they do very little computing, and one of the older computers, which the designers are forced to use, would be more than adequate for "executive" use, and the designer/technician would more fully utilize the increased processor speed, memory, storage, better display, etc. of the newer computer.
FWIW -- this seems to be an epidemic problem from the smaller shops to the largest corporations. That is the primary objective has shifted from getting the product out the door, on time and at a profit, to all sorts of organizational "head games."
Unka' George [George McDuffee]
------------------------------------------- He that will not apply new remedies, must expect new evils: for Time is the greatest innovator: and if Time, of course, alter things to the worse, and wisdom and counsel shall not alter them to the better, what shall be the end?
Francis Bacon (1561-1626), English philosopher, essayist, statesman. Essays, "Of Innovations" (1597-1625).