that is true so far because we have largely been successful developing new technologies to expand agricultural production. thus its current state is more vulnerable for this reason. We have artificially increased the carrying capacity of the land. This increases its vulnerability if there is a "technological" disruption. Such as no access to petrochemical-derived fertilizer (during current RU/UA conflict), new GMO/GE seeds (because they are designed to require repurchasing), groundwater depletion due to overpumping (Ogallala comes to mind), plant disease and insects adapting to monocrop and GE/GMO agriculture (making pesticides ineffective).