why do people feel the need to buy expensive cable


I have tried expensive cables and one's moderately priced. I would say there were some differences but I can't actually say the expensive cables were better. IMHO I believe a lot of people buy expensive cables because they don't actual trust their ears and are afraid of making a mistake. They figure the expensive cables are better for the fact they cost more. If you have a difference of opinion or share the same thoughts, I would like to hear about it.
taters
Oh.... The secret of directional wire is protected lore like the 12th degree of Freemasonry, huh? It’s such esoteric knowledge it can’t be obtained through conventional means? So it’s got to be protected and rationed at a high price? That sounds exactly like audio Scientology to me. Is there a special class I need to take for $10,000 so I can hear the difference?
I've been slowly replacing my cables with low to medium upgrades from the original .50 cent supplied ones and note a significant increase in the  quality of sound. My last purchas of a pair of 18" cables said to give them a 175 hour burn in time. WHAT? Can that really make a difference to the human ear?
Obviously the directional arrows on speaker wire is so you know to reverse them in Australia and  Bizarro world. 
Blah blah blah. Cables make a difference if you can’t hear it you are in the wrong hobby.  You should go be a videophile!
@calvinj 

HDMI cables simply don't make any audio difference. Period. End of story. Cables carrying analog signals, yeah. Cables transporting serial packet based data with ECC QoS don't. Anybody who tells you otherwise is lying.