true; however i'll use a simple analogy to convey my point.
In many LEGO sets, there are yellow bricks. I have yellow bricks in my Star Wars ones and in my moon landing one.
If my dog required yellow bricks for nutrition, would it matter if I got them from the moon landing set or from the star wars sets??
That being said, I recognize that the good points in corn may be overshadowed by the bad. However, what many people (most of the veterinary field included) do not see is that if they would look at the NUTRITIONAL value of a food over the ingredients, and feed accordingly, even Ol Roy could keep a dog healthy.
I just see/hear too many people putting their dogs on these weirdo health freak diets, and I see the dogs suffering for it later. Oh they don't have a corn allergy, but they have almost every immune disease there is, improperly formed bones due to lack of minerals, lack of eyesight and hearing because of amino acid imbalance, etc.