because we arent allowed to freely explore the earth to provide a solid answer? the default perception we have is that its flat and stationary, we arent allowed to go to the edge. what do you want me to do, lie to you? why dont you take it up with the governments of the world and instead ask "why is the antartic ice treaty in place not allowing anyone to go beyond the 60th south parallel?"  look at the red lines in my attached image, you are not alllowed beyond those lines to see what is beyond them
Canada