Grunting was what man did before realizing his full potential. Music is the sound of silence magnified to beauty, it is that which makes birds great to have around, it is that which causes men from wars long past to weep and that which causes those who weep without ceasing to stop and be uplifted. It is not grunting.
Old-fashioned, yes. But songs and lyrics and verse were all we had in my day, when I watched from afar. It's just what we would do! And I'd be more than interested to hear you sing if there is nothing about "grunting" involved.