An architect taking photographs of architecture should be studying the thinking behind the building as well as the visual aspects of the image. Composition becomes critical as the photograph itself becomes a piece of architecture in two dimensions.
These photographs could be seen to be a notebook, recording the meaning and the physical aspects of the man-made environment. They help in understanding the structure as well as in appreciating how light and time affect form.
The notes feed back into creative work, but the forms are not copied directly in design, because a context never repeats.