Setting aside the possibility that the delayed-marshmallow-gratification thing has been exaggerated by people wanting to downplay IQ, and taking it at face valu

Setting aside the possibility that the delayed-marshmallow-gratification thing has been exaggerated by people wanting to downplay IQ, and taking it at face value: the fact that IQ is not the single most important predictor of scholastic and/or life success does not make it unimportant. It warrants discussion, especially if it can be improved. For example, eliminating childhood malnutrition can improve IQ significantly across whole populations. Isn't that something to be excited about?