The whole fat is bad saturated fats deal has been way overblown. I think a typical low carb diet could be just the absence of garbage carbs. Sugars wheat and other low nutritional carbs. Hell just eliminating all the junk food would do it for most people. Most foods that are pre made have sugar in them and bad fats.
The food pyramid was based on corporate input not human nutrition. You can see who spent the most bucks. The veggie or fruit farmers or the wheat/grain farmers? Just look at the aisles at the store several of cereals and breads far more then anything else. But most people don’t need that many carbs. They tend to be low in nutrition and high in calories.
Humans have eaten high fat forever but now it is killing us? What’s wrong with the picture? Cholesterol is horrible but natural sources of it tend to cause the body to produce less cholesterol. But if you listen to current heath advice it is a horrible thing we all should avoid.
Lazyness and fast foods/junk food pre prepared foods are the bad things. Plus our low quality foods that are mass produced these days.