It’s quite nightmarish to think that your essence could be in a vat somewhere being poked and prodded by godlike super-scientists.
Yes many dreams, good or bad, can come from the idea.
As I’ve said before, the only way for the soul to be truly eternal and indestructible is for it to be defined as nothingness.
Lack of destruction does not assert absolute indestructibility. Perhaps indestructible from a position on this plane.
JEDIT: Or perhaps it is indestructible because of where it is. Perhaps there’s a logical, physically quantifiable reason why Lucifer and his followers were not destroyed but rather exiled. The Bible says they at some point are thrown into the lake of fire (which is not necessarily Hell), but it does not say they are obliterated. Maybe there’s an actual knowable scientific explanation why. Just not by any science we can know from here.