There are many legends, mythologies, and stories told of how the world of Waste came to exist (not including the mythologies of the tribes of Mōn, who fabricate a new origin myth each night to please the Avatar of Mōn that travels with them, a once-upon-a-time God of storytellers and liars).
The most widely known mythology, and what many accept (at least in some part) to be the truest interpretation, is the origin story as related by the Cosmogaunts, the mystic Astronomer-witches who turn their dark black eyes to the heavens and claim a unique understanding of the stars and planets, despite the fact the contents of the sky are never the same each night.
According to them, the "world" as perceived is physically made up of the brains of numerous dead gods, ripped from their skulls, unraveled into flat, disk-like shapes and then stitched together by a race of hive-mind, dream-eating spiders.
What purpose motivates the spiders is as much a mystery as any other, including whether or not the people and places are then facsimiles created by the God brains or are physically brought here from somewhere else.
Of course, for many of the inhabitants, the answers are as irrelevant as the questions; they are trapped here, and forced to survive by any means possible only because death itself is not an escape from this bastard world, but an even harsher prison.
To people like this, what value is there in knowing how it all came to be?