I wish there was more discussion of ayurvedic medicine on Curezone. A lot of people could derive benefit and improve their health.
For some doshas though, a high carb diet is not really recommended. For example in an extreme vata imbalance the high fat/oil/meat diet is more appropriate. If pitta is extremely out of balance then high carb would be good to feed the liver.
If a person was extremely overweight indicating kapha imbalance then low fat, high spice and moderate carbohydrates would be indicated but not the heavy grains or sweet fruits.
I do think that a lot people are working at cross purposes though by eating incorrectly and then having to undergo constant cleanses to balance the underlying incorrect diet.