Uh huh. I can fix my car without knowing metallurgy and fluid dynamics, but you wouldn't want me building you an engine. Just because people are getting by do

Uh huh. I can fix my car without knowing metallurgy and fluid dynamics, but you wouldn't want me building you an engine. Just because people are getting by doing the technical equivalent of changing sparkplugs doesn't mean that I want to hire them to do something more difficult.