To satisfy your curiosity, purchase a Waudio cable on Amazon for about $50 and swap it in and see what happens. It won't tell you if the $1,000 power cable is better than a $500 cable, but it should tell you if it's better to your ears than a truly budget cable. The reason that I suggest the Waudio cable is that I have three in my system and noticed a significant difference with it for my amplifier.
I think there's an element of the size and weight that gives the impression of quality. Maybe it's an integral part of the design and maybe it's done for esoteric reasons. Every product has a marketing influence in the design.