So we're back to square one; chicken or the egg. If your argument is that musicians are more inspired when they're deluded or that they believe in falsehoods... Maybe not false, but as a consumer, and as a self-proclaimed representative of consumers, I would argue that facts/reality should trump delusions and false beliefs.
Again, if $50,000 worth of snake-oil cables doesn't sound any better than $50 worth of wires, you could argue that the delusions increase music enjoyment, but at what cost? What about special magic crystals or bracelets that improve health, what about homeopathy, etc.? It's all the same garbage... Either you're rational and skeptical and are against snake-oil and other BS, or you're with the charlatans and idiots who believe in it!
Really, all about the skeptic philosophy.