The argument about security comes up a lot and makes intuitive sense. Although it seems far more complex than just protecting farmland and a simple yearly statistic. Developed countries can be ridiculously dependent on centralised supply chains to process and deliver food. And many of the inputs and equipment require a complex industrial base to support. We don't just need the space to grow food. We need to feed it, protect it from pests, harvest it, process it, deliver it to people. In most countries Iit is very dependent on electricity, heavy industry and global trade for equipment.