Not everyone subscribes to Science Advances. I can't even get their page to load. Humor us and try to explain your thoughts instead of complaining about the "effort" of the GP, please.
The answer to GP's objection is not explained in the linked article, as far as I can tell.
The writers of a research paper have a vested interest in seeming smart and displaying their findings as a novel contribution to the greater corpus of research. It's better to think skeptically and critically about any new research paper than to accept it as fact.