Lions sleep 15 to 20 hours per day. So do sloths. There may be a lesson in that for us. We don’t know what lazy is. If anything, we’re addicted to productivity. We always want more.
This seems to be a symptom of modernity, rather than an inherent part of human nature. There are hunter-gatherer societies that work far fewer hours than we do.
In modern society, we don’t know when enough is enough. And it’s making us unhappy. Take some time off and spend more time in nature.