There is not much doubt in my mind that the ADA has devised several ways to comprimise our dental enamel, which invites decay that they can then treat.
It is called "Create the Problem, Offer the Solution" {CTP OTS]
This is one of the best examples I have seen lately, but CTP OTS exists everywhere, not just in dentistry.
Dental health is vitally important to overall health, a real threat if not good. We are in a bind where we have to see the dentist but when we do we get "assaulted" in these ways. We need an alternative to this monopoly on dental care, they have hurt too many already.