No, unlike GingisK, I would not scoff at this concept, and I have thought of it before as well. Even if the body survives, it is widely excepted that the soul is not purely physical. If it was, obviously, it would have been discovered by now. But there is a big difference between dying by trauma or disease and decomposing, and even by burning or cremation and what happens if you are near the detonation of an atomic blast, which is far more than just heat energy. Perhaps to a secularist or athiest, the idea of a soul/spirit is comedic, but even if you are not Christian, there are a lot of other religions and even New-Agers who believe variously in the idea of souls or an after-life.
What would worry me is the question of who and why they are so concerned about the preservation of souls. It’s a very worrisome question if these ‘entities’ are not doing God’s work.
I do not scoff at this concept even a tiny bit. I just do not claim to know it is fact.