The ONLY cables that are in fact directional are either balanced cables with a isolated shield/cap bypass which can be used as a band aid for ground loop problems, or pure snake oil.
You are mistaken. Many single-ended interconnects use shielding that is connected only on the source end. It's a very effective technique and certainly not "snake oil."
@tvrgeek I think you may be getting too much of your information from those Youtube "experts."