Fallacy of composition. It does not logically follow that given Palmitic acid is the most abundant SFA in the US diet (objectively true), and given the US diet directly leads to poor health outcomes (very likely but not proven at least not to the level of the prior claim), that Palmitic acid contributes to poor health outcomes. It's entirely possible Palmitic acid is great for you and if we had less we'd be doing even worse. The statements are simply not connected at all.