Methinks you two are arguing about different scenarios.
Katrina was a localized event of short duration and substantial advanced notice. The whole country contributed to rescuing it. The entitled could, on the whole, sit there for a few days and wait for others to meet their needs; uncomfortable, yes, but not long for the system to restart.
The point of this thread is a national event of indefinite duration and little advanced notice. The entitled would not be helped as the would-be helpers would be suffering themselves.
One city, a few days’ warning, a few days’ crisis, yes warehouses can be raided to compensate.
All cities, a few hours’ warning, ongoing crisis, all warehouses will be emptied in short order and no one available for distribution and no viable infrastructure to distribute on.
Different scenarios.
It's wonderful to be right so often!