> But for 50 years they've been told "carbs and whole grains are good for you".

Carbs have replaced fats as the conventional wisdom thing to religiously minimize for a couple of decades now; this is like reading a canned rant that was found in a time capsule from the 1990s.

I guess it matters if a person continues learning throughout their life. Some people decide their book learnin is over at high school, and those people will stay forever behind.