Concerning how they came to be in this real world, in the bodies of their game character; there are theories that have been formed in hopes that it can give them a detailed and understandable explanation to their question.
Sadly for them, whatever theories they came up with led them to a dead end, with no other assumptions surfacing the more they dive into the theory.
They are in a pickle with hard turns on whatever road they decide to thread on.
Both of them make a valid point in supporting their claim. They cannot live in this forest forever. There will eventually come a time when they have to vacate the forest for the outside world.
That is a fact in itself. It was only a matter of when they would leave.
As for the when? Louise's question is what will be the basis to determine that?