because at the time of war, you don't get to save you only look for safety like Ukraine citizens are going through that as an example. Regarding to food too, planting and harvesting are not done overnight, it takes time for crops to mature, so the earlier the better.
Even in our region, where it is impossible to farm with economic feasibility, governments have begun to support agricultural projects and go to buy lands in countries that have agricultural capabilities.
This only what to do before the economic or food crises come. It is only a wise government that plans ahead of time to avoid some common disaster which are termed as human disaster that could have been savaged with proper planning .