why do people feel the need to buy expensive cable

I read an article some few years ago that it blind A/B testing of mainstream (cheap) interconnects versus very expensive interconnects, no listener could tell the difference.  My belief is that you can build anything to a basic standard and if you package it right and price it over the top, not only will people buy it, they will actually hear a (better) difference.  This is called the "audio placebo effect."   If you pay more for aomething, you will expect a better performance...and your brain will tell you it is, in fact, better.  Happens all the time.  The majority of the responders to this post are testimony to that concept.

Dynaquest4 - Your very first post here ! . Welcome . I think we will get along swimmingly !

Blind A/B testing has been shot full of holes so many times the concept could sell in the dairy section.

or expensive watches, or expensive cars, or expensive wine, etc.....

"audio as a hobby is dying, largely by its own hand. As far as the real world is concerned, high-end audio lost its credibility during the 1980s, when it flatly refused to submit to the kind of basic honesty controls (double-blind testing, for example) that had legitimized every other serious scientific endeavor since Pascal. [This refusal] is a source of endless derisive amusement among rational people and of perpetual embarrassment for me..”

-Gordon Holt
 Stereophile