Let me try though, if you had a giant power cord, like half inch thick wires And a circuit blew inside the appliance it doesn’t matter how big the wire is before the fuse...It’s not like the large wire is holding a huge amount of electrical current as if it was waterHere's an easier way to explain it.
The gauge/composition of the power cord stops mattering the moment the current hits the very tiny gauge wire on the other end of the power supply connector.
As long as the wire is heavy enough to handle the peak current draw of the amplifier without catching fire, it literally doesn't matter after that point.
But, again, if you're enjoying your $800 power cable more than the stock cable that shipped with your amp, good for you. Keep enjoying it.