It is interesting, but I would question some of her doubts.
There was nothing in the recooking section that suggested that we should be eating lots of carbohydrates. It was just pointing out that heated cooled and reheated pasta had less sugar in it. This is of interest to anyone with diabetes who has been following a lowish carbohydrate diet but would like now and again to have a reasonable portion of pasta or rice (say 1 - 1 1/2oz dry weight). To know you can reduce the sugar spike you will get from this helpful. Not everybody has a diet high in carbs and sugar.
Yes, I agree the sudden introduction of calories in fat is irrelevant to the issue, but for anyone trying to reduce their weight or keep it stable and wanting to increase their fat consumption needs to rememeber that it is higher in calories, unit for unit, than fruit and veg or carbohydrates, so if you are going to eat more fat, you need to eat considerable less in comparable units of other food items.