Yes, yes, yes, yes and yes. Prepping is insurance against whatever might come our way be it any of the above, a job loss or other income sapping event, war, a tornado, illness or transportation problem preventing you from making it to the store, etc. It doesn't have to be a national emergency but a personal one that could cause you to break into your storage. In a drought situation, your water might go dry or if your electric pump broke, you'd have water stored so you'd be able to drink, bathe and use the toilet.
Do you carry a spare in case you have a flat? What if you never had a flat? Would someone laugh and say they told you so?
“Yes, yes, yes, yes and yes.”
So, even the December 21, 2012 Mayan calendar thing??? That one seems a little too ancient and obsolete for taking too seriously.