Developing repair skills beyond those offered by most guitar shops is not a high bar considering most shops don't offer repair and just have a "tech" whose training stops at intonation and truss rod adjustment, the stuff required for basic setup. Personally, I think every guitarist should learn setup even if they plan on paying someone to do it, it is not difficult or time consuming to learn and if you can tune a guitar you can do a setup. I did not challenge anyone and to suggest I did is a misrepresentation, not an oversimplification.

>Your attitude toward playing seems like my attitude toward my profession, which I'm actually good at.

It is the attitude required to get good .