I've had similar experiences that make me never want to go to a dentist again because these new practices are so detached from reality. They only care about what is covered by your insurance and will deceive you with non-answers to maximize it.
I've also had experiences where one dentist will tell me I have a cavity and I'll get it checked out by another dentist who cannot confirm. These types of things need some type of tally from the public so others don't let these money-grabbers get off scot free.