I don't want to hurt your sanity, but we've always been surrounded by Cthulhu-type monsters on all sides, and they can't interact with us. And yeah, business as usual on that one.

And recall, my comparison was not between really existing and being dead - it was between definitely existing with some density, and probably existing with some probability. If your relative definitely exists with a density of 1 in that patch of spacetime over there (unit is "relatives per patch of spacetime you can point to"), then the comparison is to a case where they probably exist with probability 1, which is kinda boring :P

I agree that state of mind is important. But that's always important, and thus not very informative :)