>>45982935When you walk from the exit of Vaniville Town towards Aquacorde Town, the camera swoops in close to your character and you see how big the world is compared to them. The city isn't visibile immediately but rolls into view from as you walk. It's supposed to give you an idea of a big world you're just stepping into.
You're comparing this to other "First Routes" when it's more like that first part of DP where you and Barry are walking with no Pokémon. It's meant to draw you into the adventure.