I think it was Ogden Nash who said: "Where there's a will there's a velleity." Who are you and I to argue with Ogden Nash?

A very general principle in the selection that our ancestors were exposed to, has been that we expend as little of our resources as we reasonably can, and delay unavoidable expenditure for as long as possible. In bed, warm, not yet hungry? Then stay that way; with any luck you will die or get a chance to procreate before arising is unavoidable.

Staying in bed was not always counter-productive, or we would never have been selected for sleeping. Similarly, overwork can kill us, just as over-eating and over-drinking can. There is no parameter that we can not overdo. As a rule in nature the things that we are tempted to overdo are those things that depend on resources that rarely are available in excess. Selection for complex strategies that require long foresight is something of an evolutionary novelty in human beings.

Pity about that!