Well, you are right in a sense. I believe when a piece is played, there is a lot more that just recitation occurring. Whenever playing a piece, your feelings and internal mental state are intertwined with your interpretation of the piece. In that sense it is similar to art; painting for example, and i'm no expert, is essentially following certain guidelines whilst expressing yourself. For example, whenever you paint a tree there is a certain set of rules you can follow, these rules might make your tree look more like a tree, but your tree will always be a little different. Music, in my opinion, is a performance art. It's still artistic because of how you choose to interpret the piece whilst still expressing yourself. Take anything i say with a grain of salt, i'm not an expert in painting nor music.