Whether the author intended a symbolic resonance to exist in...

Whether the author intended a symbolic resonance to exist in her book is irrelevant. All that matters is whether it's there. Because the book does not exist for the benefit of the author, the book exists for the benefit of YOU. If we as readers can have a bigger and richer experience with the world as a result of reading a symbol and that symbol wasn't intended by the author, WE STILL WIN.