Both literature and religion have mined the rich seams of metaphor and allegory they found in Plato's Cave. The problem I have is: both tend to skip over the little matter of the removing of the shackles to move straight on to their depictions of their idealised worlds - whether that be Narnia, Heaven, Middle Earth or wherever else.
That's cheating in my book. When was the last time you stood on the bank of a river and then suddenly, without explanation, found yourself on the opposite bank?
If the shackles turn out to be death then that is not a terribly useful solution. If they turn out to be illusion, then you have to provide a mechanism by which that is removed. No wardrobes allowed.