Cloning can be as time consuming as breeding, so the effort needed for both of them is somewhat similar. This is why most ppl do not clone random 5IVs. Those that mostly get cloned are HP pokés, shinies with compative IV's, moves and natures and legendaries that are compative.One could argue that it reduces the value of the pokemon being received. If I trade you my original 5IV for your cloned 5IV, I'm the one getting ripped off, not you.