So that death isn't so scary. People don't like the idea that someday they will flicker out like and everything will go dark.
I've always found that a lazy man's philosophy. Something for those lacking in the courage of their convictions. It seems a bureaucratic response to matters better left to the head or heart. I would hope a just YHWH would have more respect for the atheist willing to commit to an actual philosophy than someone who went along only because they had nothing to loose.