IOW, would I take 50-50 odds of surviving instead of 100% chance of surviving? NO.
All of us are paying the cost of rescuing people who put themselves in danger. It's much easier and cheaper for us to pay for water, MRE's, and shelter space than it is to pay for helicopters to pluck people off their roofs, or dig their bodies out of rubble. So we should have something to say about it.
Most people know what kind of natural disaster they could be threatened by - hurricane, tornado, earthquake, etc. - and if they're not prepared to deal with the risk, there are other parts of the country to move to.
You like to simplify things, I see. I tend to consider the circumstances surrounding an event before I judge. There are still too many variance factors up in the air.
Like I said, if this freeper lived in Galveston or other coast lines, I'd say go! without question, but not knowing all the details about this particular area specifically, I would not condemn him or her for leaning toward staying.
Please spare me your lecture about tax paying. Contact your representatives to complain about how your tax dollars are spent.