One of the first things they teach you in (good) art schools is to think about what your definition of art is. It's not the same for all artists, and not the same for all audiences. Some artists discount the audience altogether, or make art for a very particular audience. If it's not for you, it's not for you, no big deal. Art doesn't have to affect all people in the same way, or even be intended for more than one person to be valid. Sometimes you need specific prior knowledge or experience to understand a piece.