Have you seen the cars all over the city? Did you see the jammed parking lot at Walmart when they were looting? Many couldn't leave because they were waiting for an opportunity to loot.
Yes. That's true enough. But there are many people in the city who don't own cars and not everyone was looting. I sure hope you won't suggest that everyone stuck in NO is a looter, while chastising them for not being car thieves.