ShowME I was meaning how the "carbs are healthy" voice gets interpreted in practice.
The base of the food pyramid illustration in the link also showed how people came to believe carbohydrates, including the most refined ones, should be eaten in a greater quantity than any other food. That false idea came to be thought of as "healthy", when it is not healthy at all.
The "Eat Well Plate" has a large amount starchy, mainly white, carbohydrates illustrated as being equal in value to vegetables and fruit.
Then, given the vegetables and fruits on the other side also have carbohydrates - (a lot of them from high sugar too) the two added together means there are massively too many carbohydrates on the "Eat well plate", and its out of proportion to other food groups.
Pulses are given a tiny wedge on the E-WP. In reality someone vegetarian could eat a whole tin of pulses plus a lot of Broccoli together with a tablespoon of oil (not even shown) and be healthy, and not hungry for hours - having eaten a balance of carbohydrates, green vegetable and essential oil. They would not get fat.
A meat eater could eat fish, oil, and broccoli or someone could have a wedge of fatty cheese and a vegetable (as in cauliflower cheese) and still have had enough carbohydrate and protein and vegetable, not get hungry and not get fat.
No essential fats in the form of oils, nuts, avocados, coconut oil are shown on the E-WP. Only skim milk and yogurt are shown when in reality people who eat full fat versions will have less tendency to snack on sugar and less tendency to put on weight.
Basically, the message of the E-W plate is to live on carbohydrates as the main staple of your diet, have almost no fat, and a very little protein.
Medical research at Newcastle has led to the ideas behind The Low Blood Sugar Diet, which takes a new approach to preventing pre-diabetes from becoming diabetes through a different sort of diet. It is worth reading the introduction just to understand what happens to the body when too many carbohydrates are eaten and many of the principles described can be applied to everyday eating among people who do are not pre-diabetic or diabetic.
Fruit juices and smoothies as "Part of your [healthy] five a day", are so high in sugar that that was a very health-damaging, false, marketing-geared message that filtered through to us consumers over the last three decades.