A poet upon his or her death " Does Not Go Gentle Into That Good Night", for they have something to share with future generations through their poetry.
Robert Frost "When faced with two roads diverged in a yellow wood he took the one less traveled by and that made all the difference."
Was William Blake laid to rest under A Poison Tree? Or was he saying that we are like  poison to our enemies? One beauty concerning poetry is that it can be left up to the interpretation of the reader. Even if it was written to mean one thing the readers can discover several possible meanings to the poem like discovering jewels each time it is read.
Perhaps lets for fun imagine" The Raven", giving the eulogy for Edgar Allan Poe, and talking about his life and the loves that inspired his poetry especially Poe's beloved" Annabel Lee" and "Lenore. "The Raven" proceeded to close his eulogy with the words " Nevermore".
Maybe when it was time for William Shakespeare to be laid to rest while dressed up in his Sunday best. His poem " Fear No More" could have been read leaving not one dry eye as many fans cried for a great poet and playwright had died. A big comfort to his fans is that his work is forevermore immortalized in print for future generations to enjoy. As Dylan Thomas best stated " And Death Shall Have No Dominion" because the poets words still live on in print to be read and enjoyed and discovered by many generations to come. The poems that a poet writes are there legacy that they leave for future generations.