Because I could. Because I liked the spatial relationship created by so doing. Because the image is as much a graphic as a photograph of a red chair. Because I sometimes like a lot of space around the main point or image in a photograph. Because sometimes more is more, and because sometimes less is more. And for another reason which I won't get into right now.
Shel > From: Kenneth Waller > Why did you include so much black above the chair?

