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
Maplegrovemusic, no I was not referring to you.  You presented strawman argument, since people are only sharing their experiences not telling others how much money they have to spend.  If anything I found people telling others, that spending money on cables is silly, that they are cheated by manufactures, that lamp cord from Home Depot is just fine.  Even title of this thread suggests it.
Well, I just had friends over for a beer and some listening after swapping my entry level brand X cables ($400msrp) out from the monitors (tweeter/midrange) and replaced them with the same brand X extreme level ($1650) cable. I also replaced fuses (a slim wire on the mains) with Hi-Fi fuses in the preamp and phonostage.

The remarkable thing is I had noted a particular sweetening in upper frequencies and a much greater "humanness" and focus to the vocal bits, and a lose of edginess and slight grain to some upper frequency details. They noted the same and then we talked about the wire changes. It was more musical.

For me, this was a system upgrade worth the expense, especially since I bought the wire on A’gon used 9/10, already burned-in, and the fuses had a 30 day trial guarantee, of which I will not be taking advantage.

So, to my ears, (and wallet) this was a totally acceptable trade in treasure for performance. Whether or not this had anything to do with a "wire" purchase, I could not have cared less. It was a sound improvement. And this makes a case for feeling the need to buy expensive cables. Because they can work in the context of a "system".
great , we got melbguy back . Took a cable discussion to do it . Now the sharks are all in the water circling .
I am not saying i will never spend more money than i do now . Once i have tried all the wire with costs that are warranted i might be curious to try more wires . I do not expect better results because they cost more . Just read an article where the owner of Shunyata made claims that other Wire companies actually use inferior wire in the base model so there next level sounds better . So with that theory their mid priced would be on par with non audiophile producers of wire . Disregard the melbguy statement above . Must have been reading a different page when i responded 
Caelin Gabriel has said a lot about the cabling industry and a lot about wire, including his own. A great article about mains cables, the sonic differences, and what can and can’t be measured, but still heard. I  enjoy his closing comments (about the last five paragraphs of the interview).

http://www.theaudiobeat.com/visits/shunyata_visit_interview.htm