I mean, if you are directing actors to do one thing and then directing them to do something else entirely because the one thing you wanted them to do may not work, then you are just shattering their confidence in the project.
I distrust thought. The interior life is highly overrated. I don't like the wispy and the vague... or inductive logic in any kind of writing. I'm impatient with writers who make too much sense. The better things that I've done have come to me by instinct.