The mysteries of the universe are many and the human race has no idea of the many different portals that exist and the many dimensions that can be reached. The order had to find a way to dispose of the garbage that has been created by humans and they knew that the creation of black holes would be an essential way to achieve this. This is the reason why there are 4 black holes that are located in 4 specific uncharted areas of the Pacific and Atlantic oceans.
There are human controlled ships that go to these black holes in these very specific areas. They are also guarded by special devices that create currents that make it impossible for any ships or boats to get close to this black holes. There would be a lot of misuse of these black holes if everyone had access to them.