Well, there certainly is more to nutrition than bodyfat percentages. A LOT MORE!!
For the most part, eating for health is reconcilable with looking good and performing well, but with extreme goals like bodybuilding, diet extremes often ensue that are not consistent with eating for good health and longevity.
Berardi has background education in the health aspect of nutrition and experience with bodybuilding. I think he tries to cater to both goals as much as possible, but sometimes differentiations should be made. What is necessary for one is not always necessary or even helpful for the other.
The more you learn about nutrition, the more you'll be able to differentiate between motives.