When two physicians give you two different answers to the same question, one of them is right and one of them is wrong.
Marketing can be awesomely powerful. A good marketer could sell catnip to a dog. We've all been hoodwinked into buying some sort of product at one time or another in our lives that turned out to be a dud or a downright lie. Sea Monkeys comes to mind. I can remember being so disappointed when my sea monkeys, bought with a zillion box tops of Captain Crunch, turned out to be nothing more than brine shrimp i.e., fish food.
Most of us have heard that the definition of insanity is doing something the same way over and over again all the while expecting a different result.