There is a market for expensive cables. That market is for those who spend the money and then truly believe they can hear a difference. If they believe they hear a difference, then they feel that their music sounds more pleasing and therefore is a positive thing.
The cables don't have to really do anything to please this market, and if that segment of the market is pleased, these cables serve a purpose. I'm just glad I cannot hear any difference when there is none. My cables are a mix of Kimber Kable, Wireworld and Monoprice. They all sound pretty damn good though the Kimbers look cooler.