No one says or believes this in 2015. This story must have happened a long, long time ago.
It tells them to eat way way way more starches and carbs than proper proportion for protein and vegetables. The average American food choice is loaded with wheat, as well as heavily processed wheat, like flour. It frowns on eggs, or at least the yolks, one of nature's rare food sources of vitamin D, so "healthy" folks eat just the white! *rolls eyes* Cooking is dominated by olive and other seed oils, like coconut. It attempts to replace animal protein with estrogen-rich vegetable Soy protein, and all kinds of bad things happen.
You can believe what you want, but I think that people who want to believe that fat isn't fattening, or consuming cholesterol doesn't raise cholesterol are in denial or are believing some serious BS.
Tell that to the majority of folks who still think margarine is "healthier" than butter, or who think lard is bad for you.
I have a friend whose wife is a nurse, very conscious of things like cholesterol, etc. She put him in charge of cooking (he's a good cook), and he started using lard for such things as fish and chicken and biscuits, though she wasn't aware of it. Her cholesterol levels went down. When she told my friend, "Wow, your cooking has helped, what have you been doing?" You had better believe that he knew it was going to be hard for her to get used to the idea that the lard was actually a healthier choice.
Eating stupid and getting zero exercise is fattening. Fat is a necessary nutrient the body needs to process everything else.
They avoid egg-yolks altogether and eat only egg-whites.
Bad info, and old, but lots of young people still believe the BS.
As a former food service professional that still keeps my hand in, I see it all the time.
Food fetishists abound, and they are mostly wrong or contradicted by modern research... which may change.
/johnny