The article just aims to bring that concept to light. It's also a little jab to those who consider themselves "connoisseurs" of anything, wine tasting, televisions, food, or otherwise... because not knowing about one of the most influential forces in your opinion as a "connoisseur" really makes you "not so smart".
I can't speak for wine, but beer has similar licensing that involves a thorough blind tasting test. The tasting is not to judge good or bad, but to identify variety classifications and various properties of each beer. The results are repeatable since it's a test that can be passed with enough preparation.