I tend to agree. Some argue that there's a difference between something that is overtly just an expensive show-off item, e.g. jewellery, and audiophile USB cables, which involve a deliberate deception. That's an interesting point but, if we leave aside the question of deceptive marketing (which a lot of vendors carefully avoid, including those who sell expensive but well-engineered, by ASR standard, equipment) then I think both the necklace and USB cable work by the same magic. They both rely on belief that something is changed for the better through the item and there's a mystery involved in the how. How does this necklace make me more pretty, desirable, superior, impressive, aloof, or whatever it is I believe it will do? Hard to say but by some magic it often does seem to work, if sometimes only in my own mind, or not very durably in the minds of others. But history clearly shows this kind of adornment is extremely important and effective in influencing social relations. I'd argue it's the same with the USB cable. I suspect it's the same thing with a Benchmark power amp. It's hard to know for sure that it really does sound better than another amp with fewer sinads and this not knowing is the same mystery at the center of the magic of all luxury goods.