Starvation is an acute problem for those living with it. They need to not die right now. So yes, absolutely we should do it. The converse is saying to them "it's better for you to have a balanced diet, which is harder to do, so you're just going to have to starve." Just solve the problem they're living with in the cheapest, easiest way possible, and then improve the overall picture when the situation isn't so dire.