Sorry, I may have misunderstood part of what you said. I know what you mean here and I can't argue it because there is no argument. There are some folks with expensive cartridges that will use magic eraser, believe it or not, I've run into them. On the other hand in backing your statement, I do wonder that if they bothered to spend four digits or something on the cart, why not spend the extra $60 (less now) on a zerodust? I admit it makes no sense (unless of course they spent all the money they have on the cart, but where it me, I would have factored in the cost of the zerodust, but that's me).
I'm only saying the two products do the same thing with different material and the damage risk is the same, however with the zerodust being a lot more sticky than M.E., it may be that it does a better job. (That's why I ordered a zerodust, to see for myself and it certainly won't hurt to use it from now on anyway).
I read someplace that the material we know as zerodust was not originally designed for cleaning needles either, but I'll be darned if I can find that now. Doesn't much matter though since it works.