Ever seen a show or movie where the ghost is talking to the person they're trying to get the attention of, but of course the person can't hear or see them? This reminds me of the level of perception and realization on this topic, universally.
Cables that cost that much are sold in places that have had the margins on traditionally profitable items (TVs are prime examples), so the profitability has to be recouped somehow. Part of the reason why selling more audio gear isn't good enough to compensate for this has been the focus on video in the past 5-6 years due to HD. Frankly, companies that focus of being "HD/big screen kings" are signing their own death warrants without figuring a way to compensate. Cables do this.
BlueJeans and the like have nothing else to sell--so they can be cheaper. Of course, reality often trumps theory, and I've seen cheap cables "pass the signal" in identical ways, provided everything else is ideal and reliability of construction is a secondary concern. Pricier cables, even in the digital domain, are built better and typically have lifetime support either from the dealer or manufacturer themselves, and of course this costs money too.
Keep in mind that the scheme ID companies play today is offering products based on perception of value, with no direct comparison to prove otherwise, since the net has its own unique economy and ability to price things.
