[tueiyutv] More creative theater

Theater is a fascinating form of art because considerable effort, creative output, is required to take it from merely a script to a finished production.  In copyright terms, every production is necessarily a derivative work.

Consider going further: a play whose script only includes broad directions of what the topic of dialogues should be, requiring each production to come up with the exact lines to be spoken.

Further: musical theater along these lines.  Each production must compose, or at least arrange, music.

Notice how the current demarcation of what part is unchanged and what part is a directorial decision precisely falls along the lines of Composer (or Writer) as Hero.

Is writing words necessarily more difficult artistically than casting actors, designing a set, and blocking and the other artistic actions of acting?