why do people feel the need to buy expensive cable

Threads like this.. They're attractive to audiophiles like a shiny bit of tinsel to a crow..
You just HAVE to respond
Adding anther few lines of infinite wisdom to the outhouse floor.

Agree!  Was wondering myself the necessity or your latest response. 

Blah blah. Blind test. Some can’t tell some can tell. You have to have the ear. Or more importantly your own ear 

HDMI cables do NOT carry anything that in any way resembles an audio or or video signal. Try piping the raw output of your favorite movie soundtrack from an HDMI cable into an amp. I promise you won't hear music. The data coming through an HDMI cable is low level machine language. Nothing more. It might as well be a text recipe for cheesecake. I'm sorry if you think you're seeing and hearing something more with some crazy priced HDMI cable. If you'd just read the specs for the technology you'd know it's impossible and what you're really hearing or seeing is purely in your imagination. 

We don't feel the need to buy expensive cables, we feel the need to improve our system.