You can't mandate collaboration. You can define processes, schedule meetings, assign roles. But real collaboration only happens when people have a shared goal that actually interests them.
A story is that kind of goal. It has a beginning, a middle, an end. Someone has to tell it, someone has to stage it, someone has to film it. Suddenly everyone has a task that makes sense.
Roles you understand
In a story, everyone knows why their role matters. Directing keeps the overview. The camera captures the moment. The actors bring the scene to life. This isn't an abstract team exercise - you see directly what your contribution does.