Wire IS directional. Current can go one way. Or current can go the other way if you turn the cable is reversed.
Anyone seen a house or major transmission line electrician check for directionality in AC cables? I also have not seen DC transmission cable checked for directionality in solar panels to inverters, is a good example, or caravans which use DC power for fridges, televisions, stereos or microwaves. The only reason cables are directional is that they may have different plugs on the ends.
More HiFi voodoo stuff.