Why provide photos to illustrate your point and then not draw the relationship (between building features & tax policy) in the captions. To me, it was gratuitou

Why provide photos to illustrate your point and then not draw the relationship (between building features & tax policy) in the captions. To me, it was gratuitous. I know its a small point, but the subject matter is a bit light anyways. It could have been made more facile.