Because perfectly executing our imagination is hard without a massive budget. And because:
Few understand it is this insecurity that drives so many to perfect a piece of work to the point it is later universally deemed as art.
The trick is to do the work before the expensive production machine is awakened.
So:
You have to know exactly what you are going to do before stepping on set, or you already lost before you even got there. But you
also have to remain pragmatic and flexible, work with what you are getting not what you wanted, or you lost just as well.
But there are countless artists that will never be happy with any of their work, ever.
Many recognize this and utilize it in a pragmatic way, to a great benefit for all.



