What is wrong with play?

You take it too seriously. What is wrong with play? You have a purpose only as long as you are not complete (purna); till then completeness, perfection, is the purpose. But when you are complete in yourself, fully integrated within and without, then you enjoy the universe; you do not labor at it. To the disintegrated you may seem working hard, but that is their illusion. Sportsmen seem to make tremendous efforts: yet their sole motive is to play and display.

the work's own sake

Neither for yourself nor for others, but for the work's own sake. A thing worth doing is its own purpose and meaning, Make nothing a means to something else. Bind not. God does not create one thing to serve another. Each is made for its own sake. Because it is made for itself, it does not interfere. You are using things and people for purposes alien to them and you play havoc with the world and yourself