We all wish it could, but it can’t. I have a favourite example. One of Picasso’s greatest works, Guernica, was made shortly after the bombing of the town of Guernica in Spain by Franco, the fascist dictator and friend of Hitler’s. Picasso read about it and created this antiwar masterpiece from the images in his head. Afterwards, we had the bombing of Dresden, Nagasaki, Hiroshima and then 9/11. So if that scale of greatness can have no effect whatsoever, we need to realise the limitations of art and music.
Political art and music encourage others to use their own talents to protest.