Having lived in that area where the hurricane hit the hardest, I also find it difficult to understand any lack of preparation.  That includes basic knowledge.  They would not have needed to go 200 miles to reach a safer area, 20-50 miles inland would increase their safety dramatically.  It was an unusually strong and fast storm, but preparation is (or should be) done before they even identify a storm.
I experienced a strong hurricane in that area when I was a teenager, and my parents made bad decisions and were not prepared.  We barely made it out alive.  I know how many people think (or do not think), and there is little excuse for not getting off of the beach and inland a few miles.  Not to mention having basic necessities like water and non-perishable food.