There is no such a thing as reverse motor, unless you invented one. If everyone understood the nature of a cartridge and related problem solving, there would be no such discussion. Your definitions of cartridge's motor make no sense at all and leads to more confusion. The MC cartridge has generator. That is plate with cantilever/stylus attached, that has wires( coils) wound around such plate/cross/ barrels. The generator movement creates magnetic fields that magnets transfer into signal. No motor or "inverted motor".
Generator definition, a machine that converts one form of energy into another, especially mechanical energy into electrical energy.
Your analogy with 10,000 miles would count if you present the proof that the modern diamonds are 3 times harder that they used to be.