The study was badly flawed and does not support the conclusion in the headline.
I take no position on whether "low-fat" or "low-carb" is more stupid. They are both stupid. The body needs adequate amounts of both, and nutrients that are only available, or absorbable, in the presence of one or the other. While there are many unanswered questions in the science of nutrition, there is overwhelming evidence that nutrient-dense diets, all else being even close to equal, are ALWAYS superior to calorie-dense diets. In other words, avoid high-fat and high-carb diets and eat as much natural food, in as close to its natural state, as possible. Avoid refined junk. Exercise. If you are of color or live someplace other than the equator, supplement with vitamin D.