I told it only because Jon sometimes calls himself a "dull tool."
The HVAC man I knew was far below Jon in every way; truly a very low IQ. But he was a really friendly, nice man and a gentle man in both ways. His intelligence wasn't much, but he knew two things: he knew that HVAC system, and he knew that nobody else did! I guess he knew at least three things, because he also knew exactly when and how to use that leverage! None of us begrudged him the inevitable raises and bonuses he got; Lord knows his base pay was meager - to start with.
