why do people feel the need to buy expensive cable

Of course, I entirely disagree with you. There is no strong correlation between price and sounding outstanding, but there is some correlation, which means you cannot expect to find much excellence among the cheaper cables. But I remember when rejected paying $150 for Fulton's speaker wires and settled for welding wires that I thought looked like the Fulton wires but found they weren't and thus I went back to my Radio Shack wires.

I used to be a I'm not spending on cables guy. I remember when I first went from Audioquest rocket 44 and I put in clarus Crimson. Big change. Then I went the high fidelity ct1 brand and it was even better. Expensive but I enjoyed them.  I still have them and I enjoy them. I can't go back to the other stuff. The higher priced cables sounded better 90% of the time to me but all of our hearing can be a little different as well as tastes. I've been blessed to try lots of cables cheap and expensive. In 8 years I've had extended auditions of more than 20 different brands.  Some good.  Some bad but system matching is important.  You have to know what you like most. Your type of music is important as well. I listen to a lot quicker faster jazz. Speed, decay and detail is important.  It's just depends on what you like and what you are willing to pay for it.  I'm not going to down people that don't spend on cables. If you can hear the difference that all that matters.  

Good comments earlier in the thread about personal preferences, music listened to, sonic signature desired and system synergy.  All of this is so purely subjective 90+% of the time that I think we all MAY forget that from time to time.  There are alot of great cables out there costing less as well as more.  I would love to find cables at lower prices that give me the sound I'm looking for and regardless what's already been spent, I already have by some measure due to 2 reasonable dealers and 3 manufacturers who pack a hell of a lot of punch in their cables at a given price point when there are cables out there that cost 2, 3, 4, 5+ times more that claim to deliver the same thing. Believe me,...I never set out years ago thinking I'd have to allocate high-end component-level budget numbers to cable purchases....

calvinj, I'm not downing people who don't spend on cables, but certainly I know that some more expensive cables sound better than any cheaper cables I've heard. 
zephyr24069, I have often said that talking about sound is largely worthless given the variety of tastes, rooms, etc. What I have said about HFCables would be basically limited my ears, room, taste in music, and whether one likes to be present at the recording or rather to listen to nice music. But a great many agree with me. When I first heard the HFC CT-1 ics, I was immediately thought "wow these are quite different." I now have listened to complete looms of the Enhanced, Ultimate, Ultimate Reference, Ultimate Reference Rhodium, Ultimate, and once to the Pro Series. With the exception of the last, all were in my room. Each is seriously better than the preceding. I wish I could say otherwise, but cannot: more magnets are better than fewer magnets.

" have often said that talking about sound is largely worthless given the variety of tastes, rooms, etc. What I have said about XXXXX would be basically limited my ears, room, taste in music, and whether one likes to be present at the recording or rather to listen to nice music...."

Definitely agree and see your points; it's all conditional and involves a lot of variables. Human beings tend to want to boil things down to "X is better than Y" which is virtually impossible in many less-complicated categories let alone Audio Cabling!