Except it does? Capitalist countries don’t seem to have any famines. You could argue that for profit prisons are similar to gulags in some ways but the important differences are so vast it’s hard to compare them honestly.

Capitalist countries don't have famines at home. That's different from "capitalism prevents famines". Capitalism is happy to cause hunger, inflict death, or imprison people if it's profitable for capitalists, that's baked into the structure of the structure of the system. There's no systemic feature of capitalism that directs capital generating activity unless it violates natural and human rights.