I think the real answer is that it plays an important role in making sure you respond appropriately to being chased by a tiger. For hundreds of thousands of years it was perfectly fine operating in that role, and then in the last ten thousand we accidentally created a civilization where some people get way too much of it.
Also, humans are not machines, we need rest and relaxation. It’s debatable for why, but life would be a lot more boring if we didn’t have a need for relaxation, art, recreation, etc. Just pure work for survival.
I think the real answer is that it plays an important role in making sure you respond appropriately to being chased by a tiger. For hundreds of thousands of years it was perfectly fine operating in that role, and then in the last ten thousand we accidentally created a civilization where some people get way too much of it.
Also, humans are not machines, we need rest and relaxation. It’s debatable for why, but life would be a lot more boring if we didn’t have a need for relaxation, art, recreation, etc. Just pure work for survival.