I am gently teasing you, Slobodan, because you have more than once pointed out that the difference between Art and Decor is somewhat artificial and completely modern. This current discussion - which I find fascinating - does not seem consistent with that approach to the subject!
Teasing is ok. I think I ultimately saw the value in your comment about Art vs. Decor that the distinction is much more pronounced with modern art than in the past (where I found the inspiration for my claim that most, if not all, art started as decor).
As for parsing, semantic-hair splitting, etc., no, I am not fond of that at all, though I might fall into that trap from time to time. I prefer broad generalizations (the likes of my "profound difference"), that are rather
intuitive insights and open to your own interpretations, depending on the context. They are meant to provoke your own thinking about the issue, rather than
tell you in no uncertain terms what the issue (and solutions to it) are. Not unlike saying "all is fair in love and war."*
Too many people, some on this thread, are measurbators and would like to know "how long is a piece of string," what the definition of "harmony," "profound," "historic," "real" etc., etc., is (and what the definition of "is" is). They want to put every photographer in their little boxes and label them as this or that, then measure the distance between boxes (e.g. how far is Ansel Adams from Peter Lik) and between a box and the ultimate goal (e.g. how far is Lik from Art).
* Parse that, measurbators!