The history of screenwriting - of what we do - is more than 100 years old. It's thousands of years old, going back to Sophocles and Euripedes. I believe the only - the only - separation for being a dramatist is reading drama.
Whether you're writing a horror show or a James Bond film, I think what bubbles beneath is interesting characterization. The colors that emerge through storytelling is what a dramatist does. There's always got to be something bubbling underneath that will erupt at some point.