I see them less as agriculture starter kits and more as archives of genetic information. Perhaps a climatic catastrophe reaches a new equilibrium after 200 year

I see them less as agriculture starter kits and more as archives of genetic information. Perhaps a climatic catastrophe reaches a new equilibrium after 200 years. A bunch of plants have gone extinct or are so hard to find they might as well be extinct. Civilization suffers a near fatality, but recovers just enough to trek out to those seed vaults. The seeds might serve an important role in breeding projects. It's maybe not the highest utility contingency, but it mitigates risk of permanent loss of genetic information.