And yet I've written a lot of screenplays, so the thought of writing one isn't all that intimidating. I just know it's like running a marathon. It's not that you're afraid of doing it. You just know that it's going to take a lot out of you. The undisciplined need not apply for this line of work.
Script writing is a creative activity that follows a strict format.
Discipline is needed to rewrite constantly, pitch story ideas to producers and learn how to tolerate rejection. In fact, they will tell their friends not to read it. He tells students to accept rewriting as a way of life. Write another one. Once you've gotten some distance, everything isn't so immediate.