Everything is here for the same reason, for manifestation and celebration. But the humans articulate this. The others cannot articulate it reflectively. They can be a manifestation, but they cannot reflect on that. Humans can, therefore our role is to be spokespersons for the universe and to appreciate the universe as the context in which the Divine and human meet.
Song is not a luxury, but a necessary way of being in the world. If you are cut off, in pain, estranged, numb — sing, give voice to anything. It needn't sound pretty. Simply, bravely, open despite the difficulty, and let what is in out, and what is out in. Sing and your life will continue.