Sophie's Room: A Model of The Universe

I am not understanding how this analogy is a model of the universe? Also since we were discussing first cause arguments in another thread I’m not sure why this thread was necessary? In that other thread @TheMetrologist also claimed he has objectively verifiable evidence for a deity that created the universe as well, so even the first cause argument seemed moot to me, but then I’m a middling intellect with a mediocre formal education, so I guess my befuddlement is only to be expected.