Provide an electrical conductor from point A to point B, with insulation on the outside. People can understand that, and question why it costs so much. An audio amplifier is a bit of a mystery to many audiophiles, and they are more easily convinced that it is rocket science.
Good point, cables and amplifiers are hardly rocket science. As in most consumer products, each "rocket" is a marketing pitch to create tiered products for customers willing to part with more money to have something slightly better. The key word being ***slightly***.
In all honesty, most mid fi gear is extremely good (at modest SPL levels, of course). However, stoking enthusiasm through hyperbolic testimonials and pseudo-science works wonders.
Only a child might believe that the Ford Fusion can be parked on the vertical face of a building. Unfortunately, the line between fantasy and reality is not so obvious in the jargon cluttered world of high end audio...and the truth is we often want to believe the hype (especially after spending lots of hard earned $$$'s)!
As Tom Petty sings "It's Good to be King" and high priced exclusive products can help make one feel that way...so believe!