I don’t believe in hell. But that doesn’t mean that with advanced technology we couldn’t create a functional version of it in the real world.
There are some pundits out there who think we might have a chance of defeating death in the future. One of the nice things about death is that it is the ultimate eject switch. No matter how long you are tortured, whether by a disease or a sadistic individual, eventually you will die. But when you introduce the possibility of immortality, you simultaneously introduce the possibility of unending suffering.
What would be the motive for creating a real-life hell? Perhaps it would be used as a form of punishment for certain kinds of criminals. Unending suffering would be a far more effective deterrent than jail or the death penalty. Alternately, the humans or AIs in charge of some future dystopia might simply be sadists. While such outcomes seem improbable, their sheer awfulness means they deserve attention. Arguably, avoiding unending suffering via technology should rank even higher on the priority list than avoiding extinction.