The anti-folks are just cheap. Acknowledging the effect of cables (digital in particular) would set off a round of cognitive dissonance.
"To achieve scientific perfection in audio, I would have to spend more money on digital cables." Denial avoids the problem.
It is interesting that many science based deniers admit that this or that could make a difference with a digital cable, but that "better" more expensive cables don't. Not cognitive dissonance anymore, just flawed logic and science.
