The label "processed food" indicates not only that the food was probably made in a factory, but that its also full of preservatives and lacking in nutrients, generally. This article doesn't seem, to me, to be tying their argument to an appeal-to-nature.
Or they're just full of sugar. Ice cream isn't unhealthy because it 'lacks nutrients' it is unhealthy because it is basically just shoveling sugar into your mouth.
The advice to cut out these foods is probably good, but I wish they didn’t tie it to this romantic, appeal-to-nature silliness.