Especially when they crank out a "study" to prove their findings.
I used to have to listen to detail men/women regarding medications. Take my word for it, three competing drugs can each be shown to be the best. All it takes is a study that emphasizes it’s best attributes, and in truth it can be considered best on that point with the data. The other two can do exactly the same thing.
Studies are very misleading, and those running them like it that way.
Experts are most often merely hucksters trying to hoodwink individuals and groups.