If you don't believe any of this and think it's snake oil, then by all means continue that thought.
Most of my analog RCAs, digital RCAs, and XLR cables are from Morrow Audio, which uses individually insulated copper strands inside of it's cables. They recommend a longer "break in" period than others, and their cables are directional.....from the signal source. These are Litz design cables.
I also have AntiCables speaker cables that are also individually coated strands of copper wire....again Litz design cables. These also have a long break in period and are directlional from amp to speakers.
I have no idea why this works, but I have had email exchanges with both Mike Morrow and Paul Speltz at AntiCables regarding this. Some of it has to do with what they refer to as "skin effect", which is above my level of understanding. What I do know is (after break in) if I connect the cables in the opposite direction, there is an immediate degradation is sound quality.....easily noticeable, almost a haze over the sound, loss of detail, and with the speaker cables more sibilant.