I have no special insight. Most of what I know, I have learnt from the brilliant Harry Shearer, another satirist who puts the 'serious' media to shame by doing their job better. I can do little more than 're-tweet' some of his comments below.
This isn't to say that Katrina was not a devastating natural disaster. There are whole towns in Mississippi that ain't dere no more because of Katrina. They were completely blown away, with only a few, seemingly incongruous slabs of concrete to suggest there was ever a town there. They are the victims of the natural disaster. What followed in New Orleans was something different.
At the beginning of Mardi Gras 2006, Harry said that New Orleans is back, and it's on its back, and explained how the two statements can both be true. Equally, New Orleans is both the forgotten disaster and the squeaky wheel - because whenever people talk about Hurricane Katrina, they mean New Orleans, even though the disaster they describe had little to do with the Hurricane, and Mississippi is forgotten. Perhaps it's time to stop using the K word when referring to the catastrophe that struck New Orleans in 2005. It makes it too easy to conflate the Hurricane with the levee failure.
Anyone can make a few cheap shots about maintaining a city below sea level, but the reality is that there are 28 states in the US that rely on similar levee systems, with many of those levees in similar states of disrepair. If the old-Europe cheesesmiths in the Netherlands can work out a way to manage things without human tragedy and international embarrassment, one wonders why the World's Only Superpower® finds it such a challenge.
Harry Shearer: Does Obama care about New Orleans?
Playing the Inside Game -- A Cautionary Tale