I guess it's worth looking into to see if there is some outside of the OS way to force the OS to route requests to the application I already have opened and foregrounded that plays sound, but I would expect that to be the default behavior. What is a "play" request to music.app even supposed to do when I have never intentionally opened the app and don't have a playlist set up? It doesn't actually play anything since there is nothing to play. It just opens the app and takes over my screen.