I totally agree, the problem is that it's harder for people to eat healthy than simply pick a single thing and demonize it. Plus, telling people to eat healthy doesn't sell a lot of books.
On top of that, phrases like "eat healthy", "eat healthy fats", "eat cleanly", etc are ambiguous, and not helpful. This is because each person's definition of "healthy" and "clean" is different.
We need to be very specific when describing what to eat.
True, but I think the sentiment is correct at least in selling food. It's hard to get rich selling spinach, but it's easy to get rich selling Sugar-Frosted Excitement Pops - now made with whole grain-like substances!
Fad books sell to a lot of people over and over. Of course you can get rich helping people to just eat healthy, but it's harder and you likely don't get the repeat buyers. But write a book saying x is evil or fat is not your fault because y is evil and you'll get tons of buyers.
It's also more expensive to provide quality fats, proteins and carbohydrates. Compare the cost of a big mac to a free-range organic chicken breast and some fresh vegetables.
