I find it funny that the government is still trying to push people to eat all these grains and starches. They're so bad for you! And fats -- assuming you're eating the right kind -- are one of the best things you can put in your body.
There's nothing wrong with a relatively high starch diet, as long as it's the right kind of starch, eaten at the right time with gaps in between them, and balanced with adequate amounts of all the other food groups and sufficient vitamin/minerals. Most high starch diets fail badly at all those criteria, which is why they're unhealthy. It requires a bit of knowledge to craft a healthy relatively high starch diet.
High calorie high starch diets lacking in fat or protein, and continuously grazed at over the day, yeah that's a very poor way to eat and most people who eat a high starch diet eat like that which leads to poor health. But that's not what those meal plans suggested. I haven't studied them closely, but at first blush, they seem fine to me.