should a famine strike, or the distribution of food be controlled by big business/government, or total control of buying selling by government is a remote possibility in our country. but, catastrophic earthquakes, floods, etc, are very possible. those that don't have food will go after those that have as is demonstrated everyday in parts of the world. being able to protect ones family and ones self will certainly be necessary.
being prepared for the unexpected is being wise, not paranoid.