Just because you can fly around the planet, it doesn't mean places become significant enough to visit. In fact, it'd make places LESS significant since you have to search an entire world for answers and wouldn't go to every single place.
A world with a population as low as the number of NPCs in CT simply couldn't function! It certainly wouldn't reach the level of technology it has! Why? Because before you can have scientists and scholars, you have t have people providing enough surplus food and labour to support people who are not producing food or labour. Saying that There are only, what? SIX VILLAGES in the whole world is utterly ridiculous!
Even if you have a space ship that can fly around the whole world, if the person you're after is in New York, and you're from London, you don't say, 'Hey! Let's go to Milton Keynes! Or Sacramento!' Why? Because Milton Keynes is completely irrelevent to your search, so may as well be invisible on your map. RPGs take this a step further by simply not including those places you don't need to go.