Most dentist are still using the old methods and can't even diagnose a simple infection in root canal. It is all business now, more treatment more profits they don't care about patients health.
I guess they know the quote "Shortest way is the known way"

Yes you are right everything became a business even healthcare sector..
I can accept gaining profit from health sector but just with the good care.
I heard some hospitals asking unnecessary tests from their parents who has good health insurance. This kind of things should be punished hard.
It depends on the country and its health care system, if it's public, private, etc. In some country, it's the other way round, you pay a lot, but you have to try hard to get even basis tests done when you need them.