…i.e. everything that provides a place for the existence of defects... For the phenomenon of damage and destruction is ordered in such a way that if pathways had not been prepared whereby the lights can be darkened and flawed, this phenomenon of damage would simply not exist in the world. However, the pathways have already been prepared with exact precision and measure, neither less nor more than what is required. This is the cause of the flaws in the lights above and the punishments in the world below, as it goes on to say. Overall these pathways are in accordance with the rule of BaN.
Escape Hatches for Imperfection Built Into Reality
Kalach Pitchei Chokhmah 62:6