>I'm sure the same is true of doctors too.

And police officers, teachers, race car drivers, and engineers too. There is an implicit assumption that most professionals all meet some unified bar of competency but that is far too often not the case. Like most anyone else, dentists and doctors are out to get as much money as they can for as little work as possible, and that is the system we currently endure.

When I find someone who gladly tells me I don't stuff to pay for, I keep their number. On the other hand, it's getting more and more difficult to find an AC repair guy who isn't trying to sell me a new unit every maintenance visit.