Yep, I just made it up to look cool didn't I
If you seriously believe that the guys in the Genius bar/Apple store aren't trying to get the most out of you they can you are deluded.
I got an out of warranty MBP repaired free of charge and ultimately replaced with a new machine. I don't feel ripped off. In. The. Slightest.
As with any big organisation there might be the occasional customer who doesn't get top quality service. Perhaps your local Apple store has some training issues? A handful of (biased accounts) of cases of mis-diagnosis doesn't make the biggest computer company in the world a joke.