I think the OP voiced his disdain for the dental profession a year ago in this BITOG post. No need to resurrect a similar rant on this board today.
I dislike my dentist also and the value of his work is less than ideal. That does not mean I don't need him. What is clear to many of us is that relatively simple procedures are sometimes done with less than perfect craftsmanship, and that same quality could be found for much less elsewhere.
When a selection of crowns end up costing more than a new car, and the total work involved "might" involve 8 man hours, AND can be found elsewhere for 1/3rd the cost, there is a problem.
Back on topic, the OP's question is valid. This is why doing research and asking the right questions ahead of time is so critical.