Not only 28 g carbs, but 28g of quick release carbs, like a sugar injection in the arm. Several times a day.
About 4 years ago, a friend of mine persuaded me to try a couple of diet shakes with just 16 g carbs in it (I forget the brand. orange beaker). Like riding a blood glucose roller coaster. Doing that several times a day would make me feel very ill - but not everyone will feel that way. For someone used to 200g+ of carbs a day (normal in the UK), then 120g carbs, or so would be a huge improvement, wouldn't it?
Each to their own, I guess. But if I was going to eat that amount of carbs a day I would make very sure they were mainly from whole, fresh veg and salad, as much raw as possible, which would be filling, satisfying, and the carbs would release over hours, not minutes.