I went to a motorbike store a few month back to buy some gear, I had done some on-line research prior to get an idea what makes a good value for money helmet, etc. Got to the shop, asked a few questions and the guy gave me answers that were essentially bro science as we would call it. I was polite none the less, and asked what gear he personally uses. He replied ''I don't ride motorcycles''. I was a bit stumbled in shock by it, just stared at him in bemusement for a second or two, got a bit awkward then ;p.
You can see it in almost any shop now, the customer often knows more than the employee because they actually have no interest in the job they are doing. Aka the tail end of capitalism.