This could mean that not only Kelon, but also Albion could be founded by pirates, or at least their decendants. This establishes a logical link to connect the two cities through the forest and not an indirect path, say from the west, that bypasses it. However Albion is more centrally located so populations from many other places could have come there. This gives Albion, one of the most populated cities, a reason to exist in the first place, since it appears that it's built in a not-so-fertile area (next to a forest) and in the north there's a path still unreachable by humans. So, by it being partially founded by pirates, it worked as a merchants route which could be used by the pirates (now merchants) in order not to cross the whole continent with their convoys and make it easier for them to gain profit, through the old tested strategy: pillage and resale. When they became totally legal after generations, this place served as their intermediate to the rest of the world. Again, having built a city that has no links to the rest of the civilization makes little sense. Therefore, since Nova verified the timeline having Kelon first, I deduce Albion too is founded by those pirates, at least partially.
I know speculation about the origins of the region have little to do with the current knowledge on the game, but I am wondering if I stand correct, since it only seems logical for the events to have occured likewise. If I were to continue I could add ghost stories and lousy habbits on the people (genetic behavioral predisposition), or if you let your imagination run wild, you could even come up with stories of the people colonizing the area out of interest on the secrets and legends of their newfound environment, which was previously a wild place (pirates and funny stories fit well in there too). Human intervention to a specific area could also explaing why the pokemon living there are minor threats and in general weak, but theories like that would be Farfetch'd and even distracting from the main plot.