Are you under the impression that dentists are under competitive pressure? The labour supply is artificially limited, similar to other doctor specialisations.
Dentists are only slightly more honest as a profession than Chiropractors. More than half of the one's you meet are outright fraudsters/charlatans/scammers. Most who work in that business will reincarnate as cockroaches or durian fruits.
Are you in the US? This is not my experience at all. I've paid in US <2000 for dental invasive surgery including general anesthesia straight cash. That's approaching prices for medical care in Mexico.