One day my friend and I were playing harp (her) and guitar (me). The song was "Angels We Have Heard on High."

At one point I stopped playing and asked, "Am I rippling too much? I don't want to make this too rich and drown you out." She listened to me and demanded,

"If you can easily do that, why am I killing myself?"

Why indeed? So she did her thing (melody) and I did mine (arpeggios). Other people can kill themselves by doing it all, if that's what they enjoy.