A lot of performers don't want to leave the circuit, the European opera house circuit, partly because most singers don't sing many concerts, or at least not while they are in their prime.
But a writer's contribution is literary and a film is not literary. When you take that stuff off the page, and cast the people who are going to fit into those roles, that's what being a director is.
The witty woman is a tragic figure in American life. Wit destroys eroticism and eroticism destroys wit, so women must choose between taking lovers and taking no prisoners.

