It didn't matter what you look like. You don't have to get up at 5:30 in the morning and there's a lot to be said for that. Corpse Bride can just play all my parts from now on and I'll just do the voice.
So, it becomes an exercise in futility if you write something that does not express the film as the director wishes. It's still their ball game. It's their show. I think any successful composer learns how to dance around the director's impulses.