What do you mean? The chocobos need some wide open grazing ground far off enough from Midgar for some greens to grow. I don't know WTF Kalm's doing out in the boonies, but maybe the townspeople wanted some fresher air too. I always assume with these games that there's more towns that actually exist in the world than the ones they show, which are just representative. So maybe it shouldn't be literally taken as there's this big city and then a whole lot of completely empty space before the next inhabited settlement.