Is art art?

I read a story about one musician who didn't play a piano at all for 4min and 33sec. Also, he says that is a piece of art. I disagree with his perspective thinking that is an art for several reasons.

First, art should give some kinds of feelings to people. The audience must be came to the concert looking foward to listening the pianist's piano playing. However , the pianist absolutely did nothing at all. In addition, He didn't explained or helped the people to understand his behavior better. It means he failed to connect with audience cause the they were confused when they saw his playing. . Also, he disappointed so many people who paid money to enjoy music.

Second, his playing has no elements which are essential to consist music. According to naver dictionary, music is a type of art which harmonizes and combines rhythm, melody, sounds through musical instruments or voice to express feelings. But the pianist's playing doesn't have any rhythms or melodies and even sounds. It can't be called as a part of music and also cannot be an art.

To sum up, I disagree with the idea to consider '4 min and 33sec' to be a type of art becasue, first it failed to communicate with the audience and second, it has no musical elements.