In silicon manufacturing, the inefficiency is actually pretty low specifically because of the kind of binning that Intel and AMD do, that GP was complaining about. In a fully vertically integrated system with no desire to sell outside, the waste is realized. In a less integrated system the waste is taken advantage of.

In theory capitalism should broadly encourage the elimination of waste - literally every part of the animal is used, for instance. Even the hooves make glue, and the bones to make jello.