Welcome to the Barrow-Downs, Thorondor
What we've been trying to find out in this thread, is, to an extent, limited by the sub-created world of Middle-Earth. The issue we were after was not to find relation between Tolkien's Catholicism and what happens in ME, but to find only the latter - i.e., what happens
inside the [sub]world, not what particular beliefs affected Tolkien in [sub]creating this particular form of afterlife for elves or men
inside his own [sub]created world
I do not intend to say you have no point there. What I'm driving at is, that though somehow touching the issue you raised, this particular thread does not deal with it directly
You may find it interesting (and more relevant) to take a look at the following discussions:
Tolkien, Lewis and Theology by
InklingElf
LoTR - A spiritual Allegory? by
Ardwenna
Tolkien and Philosophy by
Hookbill the Goomba
10 Commandements for Middle Earth by
Aerandir Carnesir
Side-touch on the issue may be found in
Evil Things by
Nirvana II, on the pages 2 and 3 of that latter thread, and in
Acceptance of Mythology by
Snowdog
Enjoy reading and posting