Except I've already had to go into the middle of nowhere for quests. R36 btn quest? "HERE GO THROUGH THIS AREA THAT HAS PTEROCTRAPS AND ANOLES 20 RANKS ABOVE YOU"

There are plenty of other quests that require to walk to random locations as well. Hamlets anyone? I dont remember being able to teleport to those. That requires walking.
Add to that the info from the French to English thread that they are planning events for both airship and ferry. There are already quests which force players to take the long "explorative" route, and they are providing content to encourage people to take the non-instant airship/ferry trips once the longer trip is included. There will always be a need to run, or use chocobos to get somewhere. All the anima in the world won't prevent that.