Oh. That has to be it. Works for me.
What about Audrey?
Well, Audrey's arc is kind of the key to understanding it all; in fact it appears to be the primary purpose of her scenes within the story.
What do we learn from her scenes:
1. "Dreams" can be a cage. Audrey is trapped in a purgatorial loop stuck in the house with Charlie.
2. "Dreams" can be broken by a triggering moment. Her terror at the fight unexpectedly breaking out snaps her out of it, and she awakens to a new reality.
She is like the dreamer who dreams, and lives within the dream. But who is the dreamer?
The obvious answer being that its Audrey, but which is the real Audrey? How she sees herself in the situation with Charlie, or is it just her staring, confusedly into her own reflection in an all-white room?
Who is
that Audrey? What's her story?
Square that against what the Log Lady says about there being some small fear in "letting go", and Hawk's calm agreement that death is just a change, not an end.
So really, there's not much to be feared but the unknown. So when the lights go out at the end, how terrible is that really?