it’s called pride of ownership
yep.
It has nothing to do with improving sound quality or minimum required build quality.
For RCA interlinks it is important they have a decent shield which is lacking in some cases in generic stuff.
$ 27.- is not a LOT of money for interconnects, when we are talking > $ 50- for interconnects we start to enter the 'you most likely overpaid' territory and definitely would > $ 100.-
The whole thing is 'a fool and their money are easily parted' and warning against this is what ASR is also about (by showing objective evidence).
A $99.- mains cable is not needed at all. They exist, they are available, some people buy them, that's fine, that's their money.
The question is do you NEED them ?
Do they bring an actual improvement ?
Or.... do they give you a sense of 'security' and money is plentiful ?
Everyone is free to buy whatever they want even if they don't need it.
To answer the question: do fancy audio cables make a difference ?
They don't in an electrical sense but they do to people who buy them.