While I get the point, and I think it's quite apt, I think the example of religious belief in an afterlife is a misapplication of the idea.

I think that the reference is supposed to be to avoiding mourning by dismissing the pain that a relative’s death has caused you because they are fine in the afterlife. I experienced a form of this when my mother died after 12 years of Alzheimer’s - I thought I had already mourned her but had not.