Because of criminals like putin, humanity lives still by wars, already 4 years since the discovery was made, instead of swim and discover new lands.
Today is known only 2 lands from infinite amount of them on Earth: America, and Eurasia. If people will swim on east or west on a ship, people will discover new lands, which are absolutely unknown how they look like, and who lives there.
Criminals like putin, not letting people to make such a wonderful discovery.
On this picture - is explanation why is only 2 lands are known: because people thinking Earth is like a sphere. People fly or swim on it, using curved route. But if people will fly or swim using strait route, they will eventually come to an undiscovered land.