I totally believe what you say about the repairmen. In IT (where I work during the "day"), one of the major certifications teaches people to replace the mainboard and reinstall windows. No troubleshooting. Same exact thing.
It's what's fast, makes them the most money, and is the most idiot proof. That way, "even a monkey" can be trained to do it. Not a lot of craftsmen in any industry anymore, I've noticed. It's unfortunate.