While I believe a significant portion of audiophile gear is unscientific nonsense, in this case it’s not clear how adding different materials into the circuit would add distortion or change the audio in any way.
I think the (unstated) point of the article is that if banana/mud can’t be differentiated from copper wire then the audiophile/fool level cable is also nonsense, for example:
https://www.audiotherapyuk.com/product/oephi-reference-inter...
Magic cables are a _huge_ thing in the audiophile nonsense world.
If nothing else it shows those high end $1,000+ cables they buy are nothing but placebo effect.
You make it sound like these two ideas are somehow opposed.
I think that’s the point, that according to audiophile “lore” higher quality materials enhance the sound, thus mud should sound bad under that assumption, but they (apparently) can’t tell the difference.