I personally agree that we've been programmed to think certain things for certain reasons.
Remember when peanut butter could give you cancer and eggs could give you heart disease? And when margarine was way healthier than butter?
Now we know that margarine is anything but safe and healthy, eggs actually lower cholesterol, and peanut butter is not a carcinogen.
It's better for the "system" if we're nutritionally ignorant.
My father's heart disease is directly linked to him eating margarine. I can't get him to stop eating it. He simply will not listen to me. The programming is strong. Thankfully, I didn't eat much of that garbage as a kid or adult, and I also avoid junk food that has similar substances in it.