Hells offer us safety that heavens do not
Life is a ongoing study in the loss of innocence and joy as one peace or another is cut away or slowly ripped out of us. In a hell we know the parameters. There will be horror, there will be pain, there will be fear. And very occasionally, there will be rest. And we will find the steel to endure in those seconds and minutes of peace.
In a heaven, having experienced both loss and being self aware, there is always the wait for the moment when it is ripped away. For the loss of love, joy, and safety.
It becomes that we choose to endure the hell. Because the thought of one more lost heaven destroys us more thoroughly than this endurance of durance vile.