Unregulated capitalism isn’t any better, but for an example, there was mass starvation in the USSR doing some 5 year plans.
Famine was regular in Tsarist Russia, once farming was collectivized and industrialized famine ended.
Ultimately you can’t account for every factor - humans, weather, etc. Markets are more efficient than planning in some aspects, but you can’t allow rent seeking capitalists to exploit everyone either. Nationalize everything truly important and what’s allowed to exist as private enterprise, should be heavily regulated.
Famine was regular in Tsarist Russia, once farming was collectivized and industrialized famine ended.
None of that is specific, all of that is vibes.