Who says cables don't make a difference?

Funny, after all these years, people still say things like "you wasted all that money on cables". 
There are still those who believe cables don't make a difference.
I once did marketing for a cable line I consider to be about the best-Stealth Audio Cables. 
One CES, I walked the rooms with the designer/owner, Serguei Timachev. He carried a pair of his then new Indra interconnects. Going from room to room he asked the room runners to replace their source to preamp IC with the Indra. There was not one that was not completely flabbergasted and said that the Indras blew away what they were using. That was the skyrocketing of Indra and Stealth. The Indra became one of the best reviewed cables ever.
Serguei now makes the Sakra-an IC that blows away the Indra!
I don't understand why some still do not value cables as much as I.