Another interesting point. Music is old. It's been around forever, as far as we know. Both are symbolic. And if we look at children, babies, we see that even before language develops there is and inborn sense of rhythm.
Babies bounce to music, they dance, sway and bob.
Their little eyes beam with delight at the simplest of tunes, long before they can speak. Therefore, it seems musical appreciation and understanding predates language acquisition and the ability to communicate through language. Maybe this is a clue as to whether or not we need music. Perhaps music provides the background, the basis for the ability to communicate symbolically. Perhaps music creates the foundation for more complex symbolic communication.