I used supermatism as a bold example of assigning the new/specific meaning to the objective (related to objects) entities, this process is inseparable from any genre of art up to some degree, as was mentioned in this discussion. I should agree that photography has less options for its disposal in compare to painting.
I do not know what did Fan Ho try to conveyed with shadow: to create an accessory to the main object (woman at the wall) or to show the flow of attention or energy.
I'm not sure if I understood your arguments correctly for this photo, but you can consider the leading lines included in this frame as abstract narrative, up to some extent. It is always possible to look at any art as multilayered product.