Grant Morrison disse em uma entrevista do Gizmodo que não faz sentido para Gotham ser "tão horrível":
If Gotham really was an open sewer of crime and corruption, every story set there would serve to demonstrate the complete and utter failure of Batman's mission, which isn't really the message we want to send, is it? You've got Batman and all his allies as well as Commissioner Gordon and the city still exudes a vile miasma of darkness and death? I can't buy that. It's simply not realistic and flies in the face of in-story logic (and you know I like my comics realistic!) so my artists and I have taken a different tack and we want to show the cool, vibrant side of Gotham, the energy and excitement that would draw people to live and visit there.
Gotham needs as many faces as Batman - it should be the loudest, sexiest, jazziest city on Earth. It has the best restaurants, the best theaters, the best art, the best criminals, the best crimefighters etc etc. People put up with the weird crime for the sheer buzz.
Então, a resposta para a pergunta poderia ser: "não, não há explicação no universo"