That's true to a certain extent, but sleep is more than just conserving energy. People who don't or can't sleep start to have all sorts of problems. There's som

That's true to a certain extent, but sleep is more than just conserving energy. People who don't or can't sleep start to have all sorts of problems. There's something fundamental to how our bodies and brains work that we do while we sleep, and that's interesting (doubly so because we don't understand how it works).