What are some reasons for Sydney Harbor to be listed as World Heritage Area whether it already is?EXTRA DETAIL?

Since Sydney hosted the Olympic Games, the harbor is associated in many foreigners' minds (including mine) very strongly with Sydney. Some general facts from WIkipedia Bridge The south-east pylon served for many years as a lookout and tourist attraction for Sydney, containing a number of telescopes and antiquated arcade games which operated on pennies, long after that currency had gone out of circulation. The couple that ran this tourist venue also kept a number of white cats which gave the interior of the pylon a memorable odour. The pylon has recently been renovated and returned to its tourist function.[ Since the opening, the bridge has been the focal point of much tourism and national pride. In 1982, the bridge celebrated the 50th anniversary of its opening. Once again, the bridge was closed to vehicles and pedestrians allowed full access for the day. The celebrations were attended by Edward Judge, who represented Dorman Long. Australia's bicentennial celebrations on 26 January ...  more