My dad was a dentist in a small, rural town. He cared a great deal about the quality of his work. He died 17 years ago, and my family still runs into his patients who mention how their new dentists rave about the durability of his work.
So, there are dentists who aren’t in it just for the money. It is anecdotal, but so is the article. For that matter, the bad dentist was caught by a good dentist.
Also, I miss my dad.