It would appear that you ignore the fact that many of the ships that are not oil tankers pose a far greater risk to the bubble that you live in. You can brand your city as some type of utopic tourist destination all you want. But it would be difficult for most to ignore the fact that it is an international port with huge industrial infrastructure. You can stand in the rain and pretend that it is not raining but the pipeline will be coming to your a neighborhood soon. A friend of mine that travels to over 20 countries every year recently visited your city and said it is the worst place that he has ever been.