There’s also, unfortunately but importantly, the meta fan aspect of it. Even though attempting to please franchise fans rather than focus on the ST’s contained story is a recurring problem in TROS, it does arguably have value in that this is the “final Skywalker Saga episode” (a point which this very fan project is trying to emphasize with stuff like Palpatine vs Ghosts). And I think that a not-insignificant amount of people would much rather see Luke and Leia’s ghost than Ben’s ghost during the final moments at the homestead.