Perhaps unsurprisingly, audiophile circles generally shun double-blind testing.
The curious part is, the problem is not so much the audiophiles themselves, but is also the people complaining who don't think
the conditions matter. (But then, if they think the conditions don't matter, why would they insist on double-blind testing?) It's not about the product, it's about the experience.
It helps the experience, to have a good solid material, regardless of its electrical properties, so it's bound to be some sort of heavy cable. Beyond that, whether they use the materials they say they do, is a matter of marketing honesty, so if they're doing it legally, the profit margin on the more precious-metal-rich models won't be as amazing as the sticker price alone would lead you to believe.
So, is it dumb? Hell yeah it's dumb! Are people dumb? Well... I think you can figure it out.