Earlier quoted context omitted.
Obviously you can't just eat your way to a six pack. If you're trying to make a point worthy of an "and yet" prefix, it's lost on me. You can get fat by eating too much protein. Or too much fat. Intense overeating of any macro-nutrient is a bad idea. The thing is, it's harder (though by no means difficult) to overeat fat or protein. The dangerous thing about carbohydrates is they are by far the easiest to overeat, an…
Of course not a six pack, since the primary ingredient for a six pack is an absence of fat. I'm just talking muscle volume here. "And yet" was probably the wrong choice of words; I really meant "Indeed", I think.
By extension of this adage, then, if you eat fat you get fat. If you eat carbs you get starchy, and if you eat protein you get muscley. We know the second two aren't true, but the first one sticks for some reason.