When a baby is born, we celebrate a new life in the world and its potential; when a person dies, rather than mourning the loss of an impossible continued potential, we can mourn their death and then celebrate the life that they lived. A bell cannot be un-rung.
That, of course, casts primacy on the way one lives one’s life; and I suggest that a life in which the final reality of death has been prioritized is likely to be worth celebrating.