Exploring the seven hells...

[Cleretic]

Pretty sure the hells don't really exist. When you die your soul just goes to the aetherial sea. This is pretty clearly established.

Which raises the question of what's going on in the areas we go to in the Endwalker alliance raids, but it's not like we actually see any people there...

It would be a bit of an interesting twist that the seven heavens were based on a real thing (albeit not an afterlife), but the seven hells were a total fabrication.

You could certainly say... something about that notion, although I'm not quite at an end state for it yet: maybe that humanity's optimistic enough to believe that the otherworldy space they glimpsed is heaven, but so stuck on the notion of pain, punishment, or even just symmetry that they've assumed that there must also be a hell that they just haven't seen.