Why does Palmer become disheartened when Josie takes him on a tour of the Seattle waterfront in the novel, Alaskan Holiday?

Palmer becomes disheartened when Josie takes him on a tour of the Seattle waterfront because he notices how much Josie loves her hometown and how proud she is of the sights that she points out to him. He is concerned during this tour that Josie will never be happy living in the remote town of Ponder.