This isn't true at all though. I lived in New Orleans for a few years and would put it third behind NYC and Vegas on the list of 24 hour cities. Nobody used public transportation to get home and this was before uber. The demand for cabs in the downtown area late night always got people to where they needed to go safely. If you are going out for a late night of partying and are too far from home to walk, you budget an extra $x for the cab or have a DD. Not a big deal.