This is interesting indeed if true.
I'll make the first comment. I too have thought about what was taught for dentistry as a scam. The reason why is I used to get cavities when I ate a lot of junk food including candies when I was younger. But, later into adulthood I stopped consuming sugar and carbs, and stopped eating out. I got on a Keto diet and then, magically without changing any habit, no more cavities. Have not had one cavity since! Not one. Yet, I still only brush my teeth a couple times a week with hot water, nothing else. Just like I always did back in the day when I ate crap food. Same cleaning habit. It was the food that caused my cavities, or I should say the lack of sugar. Why won't they teach this in dentistry??? Maybe it's because sugar is a massive industry and racket for the medical and dental industry too?