To be blunt, I believe this is a cruel statement. What you are saying is that someone who is starving shouldn't be saved because they will grown into an adult who will have children.
You then suggest that looking at the causes of population explosions should be investigated and resolved, and therefore until this is fixed then children should starve.
Well, there's a non sequitur if ever I've heard one!
I said a cruel sort of logic. His logic is wrong. Misused logic is a sort of logic. Unfortunately, his misused logic leads to cruelty. Sort of like the logic that says you need to forcibly sterilize disabled people to reduce those who have genetic abnormalities from polluting the overall population.
You then suggest that looking at the causes of population explosions should be investigated and resolved, and therefore until this is fixed then children should starve.
A cruel sort of logic indeed.