Another fine article by a guy who doesn't understand the engineering of engines.

The K (friction) factor of plain steel is generally .18 to .19, Cadmium plated fasteners are .19, Oil lubricated is in the same .19 to .20 range. So if you re-use a plated fastener, there is no real change in clamp load. The technique of torqueing is not a mystery. I would be more shy of a mechanic that is scared to pull a jug. If the A&P was taught well, an adheres to good practice, there is no danger.