It is difficult to get a man to understand something, when his salary depends on his not understanding it.
—Upton Sinclair
Extraordinary claims require extraordinary evidence.
—Carl Sagan
Nevertheless, claims about the benefits of audiophile power or digital cables, or other such snake oil are very useful as a marker of vendors to avoid. It’s like how Nigerian 419 scammers deliberately write their outlandish letters in broken English. This helps them filter out all but the most gullible of marks, so they don’t have to waste expensive scammer labor on pursuing a lead that may wise up at the last moment.