Most people won't be ready
Judging by most of the responses, most people will not be ready because they are not capable of figuring out what they will need. This is not laziness but complacency. A few mention that in a disaster that people will steal your supplies; most people will help each other and only a few will steal supplies in the first few days.
There are a few responses that show that the way to survive is to be prepared just a little bit and to make plans. It is impossible to have a perfect plan or to have everything needed.
For those who do not feel that preparation is important, think of it as evolution in action when things do happen.
