This is probably also evolutionary. Most species, once safe and sated, tend to calm down and relax, or even nap. But we humans suffer from boredom, which tend to agitate us into action even when there is no hunger or threat. Probably the evolutionary adaptation that allowed our particular lineage to overtake (and parhaps wipe out) other competing lines of homonids and develop civilization.

and overtake all other civilizations, and overtake our less workaholic colleagues at work, etc.