If Tolkien's insight into the fate of the Elves to become the Kindly Ones and Good Neighbors is true, then wouldn't that mean a sufficiently high density amount of energy would allow them to regain their original Eldar form? What if they are fascinated by our ability to Die and escape the boundaries of this Universe, and are trying to find a way to get out of this Dimension because there are no more Vessels which can bear them out of here?
What if the whole thing is just one big metaphor for the permanent damage inflicted upon the land and the consequences for a people when they destroy the systems that support their biome?