My wife works as a dentist and there is shenanigans in this industry aswell. A chipped tooth that is easily bonded is sold into a more expensivfe crown. A typical cleaning is turned into a root scaling. Just because you have a professional designation doesn’t mean that you ahve ethics. A better look at the certification process for CPA’s or the Bar exam for lawyer isn’t to establish a benchmark for skills or abilities but rather a way of managing how many lawyers and CPA’s are practicing at any given time. This is why they are able to carge 250 an hour. Just my take.