I read Tao and Photography a while ago (my signature quote was used in the book) and enjoyed it. I think Eastern-philosophy has a lot to add to aesthetics and photography. I would equate your notion of artless art with HCB's decisive moment, where you shoot based on the alignment of the elements within the photograph rather than on Adam's visualized final form; one seems more emotive/impulsive to me and the other is more intentional. Both are valid in their place but neither can be fully practice in the presence of the other.