Let me disagree with you a bit. Good art should make you feel something. If it uplifts that's great but it is equally good art if it can make you angry, make you sad or simply leave you awestruck. A good example is combat photography which can covey any of the emotions I mentioned.
What passes for art today does none of these things. No one other than the artist has any idea of what it is supposed to represent.
Art doesn't need a sign pointing out that it is art.
True. Art should elicit a feeling.