Hard to start in on how many ways this is misinformed. Some have been detailed already, so I'll just say that you clearly haven't ever worked around tradespeople or come to know any of them. I'd guess that on average, in terms of raw intelligence, they're brighter than you. I base that assumption on the fact that you hold this opinion.Quote from Covertibility:
This is the piker part of the population.
In the real world, there are jobs for the educated, not so for the dumb ie plumbers, carpenters