The article is damning to one study.
The article is damming to the largest study. That severely skews the Meta. You take the largest favorable study out and the numbers suddenly look equivocal. You did read the entire article I assume. It is very well explained. And if you understand meta analysis you understand this without having to have a detailed explanation.
This is not only damming to one study. It completely changes the narrative of the meta analysis that includes this study.