I know what you mean. In my opinion, if there wouldn't be any kind of pattern or structure in the white part beneath the branch, the picture wouldn't just work. With the structure in this area, the eye of the viewer can find its way to the branch and the leaves. Otherwise the viewer would be lost within the empty area, I think.
So, this is an amazing work because it is well-thought! To me it looks like a fine-art photograph! You are so talented.