We work hard at what must be done out of honor, and we understand the meaning of sacrifice.
If people think a thing must be done, then they will do it. If the wolf must hunt the deer, then it shall be done.
If the stone must be moved, then it shall be done.
If there is no work to do, then nothing shall be done.
What people seek is a purpose. If we had work to do, and we built a machine to do it, that doesn't mean we had nothing to do. It means we did it.
So you're right.
Play, love, philosophy, art, and all the things that make us happy. That's what must be done.