If it wasn't, you wouldn't be given any extra photons to bounce off the book and into your eyes, and wouldn't know of the candle across the street, since the photons were "insufficient" to make themselves known to you.
Again, pedantically deconstructing a technical analogy to dismiss it on its merits is going to be hard when faced with a more pedantic pissant.
The point of the entire exercise is to acknowledge the collective vs individual contributions to the emergent tragedy of the commons.