I am happy to report, the practice of not recycling the waste or not wasting in the first place, is slowly falling out of favor, for a multitude of reasons. But, sustainability is not the first on the list.
Generally, the first priority is to maximize use, thus maximizing profit. Engineered pre-fab houses or parts of them--framing sections, for example--are great ways to maximize the material use, and minimize waste, since the pieces are assembled off-site, in a highly engineered and controlled environment. For example: