I think they are referring to low-carb studies done recently. If your diet consists of only saturated fat, it does seem to be healthier for you than the standard American/Western diet that is also high in saturated fat but also quite high in sugar, wheat, and other starchy carbs. When combined, saturated fat and carbs are a hitting a double if your goal is to be unhealthy.

General disclaimers apply regarding portion sizes etc blah blah blah I'm not a doctor.

Anecdotally, a low-(ish) carb diet and fasting has done wonders for my health and many others. I will say that there appears to be a link with higher cholesterol when consuming higher amounts of fat, but the argument in nutrition science atm seems to be centered on whether or not that is "good" cholesterol, but it's hard to measure in human patients for a long time because you essentially need to put them on a very limited diet to get good data. Those large scale trials are expensive and hard to manage at scale.