I’ve worked in several dental offices in a couple of positions. Currently, I’m a banker. So yes, you would get decent dental advice from me.
To answer your real question, there are people who want to hear only the things they already believe. If a politician says to them what they want to hear, scientifically sound or not, they will believe it wholeheartedly. The same idea applies to religious leaders and their flocks.
IF it were advice about the cost of dental work, certainly. These kinds of questions build the answer right in and it takes logic training to spot it. But you have been spotted ;)