It's functionality, not intentionality. I do not prescribe any intention formation, comprehension, and realisation planning. Just a copied perception-reaction cycle.

People can do big scale things, if they have to. But the modern "progress" and conveninece makes things like long-term planning, resourse conservation, child rearing in families unnnecessary. Ideology speeds up the process of unraveling of "obsolete" habits. The canibalism of this scale started recently, and will not last long.