"Drill 'em, fill 'em, and bill 'em"
This scam is as old as the hills. In the 70's my family's dentist gave us root canals all the time. He was later arrested for a bunch of fraud and drugs. Old co-workers later testified against him saying he made up cavities and root canals.
I had three root canals by him I probably did not need.
Not been to a dentist in 20 years (I am late 50's), no issues.