>Why isn't there a major lack of institutional trust of dentists? Between 1990 to today fillings have gone from being torture to something that takes 30 minutes

This one is personally hilarious to me. My dentist said there were "soft spots", that like a fool I let him drill. On the sides of my teeth. Those fillings lasted about 6 weeks before they fell out. He refilled them once, telling me to "chew more softly". Basically, he was setting me up to get caps... but he hadn't checked that my insurance basically covered 0% of such.

My own trust in dentists is nil at this point, though I desperately need dental work.

Dentists make their money by rushing as many patients through in a business day as they can. Boats to pay for, yadda yadda. There might be dentists out there that take their time, who pay attention to the patients needs, and are reluctant to perform irreversible and potentially damaging work... but those dentists are for rich people and I am not rich. Trusting dentists (in general) is one of the most foolish things a person can do.