I use it when the perspective I want it's not possible inside small walls! Or if I want to make a point-of-view without taking the actual head ^^
But I've noticed that your camera crops out everything already, so that's not a problem I guess! One thing I found hard was the lighting, at the beginning I didn't understand why it was so bright! Then I put "Scene Only" for the lights!
Oh, the default setting doesn't have the headlamp off!
In any case great work!
What should I do if I wanted to create multiple comic pages from the same scene? If it cuts everything and I need the other part?