It never hurts to prepared for bad times. Lots of things can happen from natural disaster to losing a job. A healthy supply of stored foo means one less thing to worry about.

If you rotate out canned/dry goods and don't buy something you won't eat you will be just fine.

Its pretty nice to think you are out of something when you look in the pantry and realize you have a case in storage. Time to swap it out and buy another case.

Then again I believe in having a plan, a backup plan and then a couple more plans just in case. Its my personality.