There are still many tribal cultures where poetry and song, there is just one word for them. There are other cultures with literacy where poetry and song are distinguished. But poetry always remembers that it has its origins in music.
I think ancient cultures incorporated death into the experience of life in a more natural way than we have done. In our obsessive focus on youth, on celebrity, our denial of death makes it harder for people who are grieving to find a place for that grief.