Are we not? We're tethered, like spirits who can't cut ties with the living world even being dead. For us it's not voluntary, but I don't think it's truly different with most the dead... and the dead can possess a living body.

( that part is said very quietly, like he's afraid to make that a suggestion anyone acts on. a spirit rehoming itself, or shoving a spirit out of its rightful body. )

That we're going back to our own, hopefully, doesn't mean the concept is so far off, I don't think... it freaks me out.