Different strokes for different folks. Some people because of their careers have the expertise to work on electrical things, some on mechanical things, etc. In my career I got to know computers - operations, programming, etc., not repairs - and later got into corporate management. If I have an electrical problem, then it better be simple... or I go to an expert. If I have a mechanical problem, then I likely don't have the heavy tools or knowledge to make repairs... so I go to an expert. A good manager knows how to delegate, but he also knows expertise can be expensive. I try to diagnose the problems as best I can so I can have a better idea of the expertise I need to solicit. Certainly, if I can perform a repair, then I try that. But on these coaches there are a lot of systems. Rarely can we find one person who has the expertise for repairing one system, let alone several of them.
Here on the forum we are lucky to have a handful of gentlemen who by their careers and/or years of Beaver ownership can help diagnose and talk us through repairs. This fact has saved me at least hundreds of dollars in my first year of Beaver ownership. I thank you all. Perhaps after another ten years I will rise to their level of helpfulness.