How many important painters do we know who only painted their art when they got a commission? None.
How many important writers do we know who only wrote when they got a commission? None.
We can't possibly create art which has a lasting impact, if all we do is to wait until somebody pays us for it. We can't possibly explore the boundaries of what works and what doesn't at school, if all we do is to prepare homework which was assigned to us.
The age of following instructions is ending. The age of figuring out what to do next has come.