I believe we have emotions for a reason, other than that they serve some unconscious function. Without intense, lasting anger, hatred, despair, &c., the great writing and music of the world would be nonexistent. If all these artists simply "let go" of their emotions, we would have nothing. Beauty lies in conflict.
I like Bach's description for one of his pieces: "Wir müssen durch viel Trübsal in das Reich Gottes eingehen." (We must through much tribulation enter into the kingdom of God.)