Assuming humans are somewhat rational it must produce something! At its worse interpretation it could be a casino. Humanity does a whole lot of wasteful things

Assuming humans are somewhat rational it must produce something! At its worse interpretation it could be a casino. Humanity does a whole lot of wasteful things. Should we ban music, too? Parks perhaps? Switch to plain clothing? In other words, who are you to decide what's wasteful and what should be banned? I would more consider the ad industry to fit this definition. Yet I saw no computation how much energy and human brains it is wasting.