A couple of the reasons they might do it this way are 1) Its how the system is built, so creating an exception might complicate things unnecessarily, and 2) Giving you the map first, with the various npcs highlighted if they have something for you, gives you a chance to quickly get am idea of where you're going or remind you of something extra. It could even be future proofing for adding additional landing points if the Tower gets expanded. That said, if they did implement this, I'd hope it would be an option, auto land or map to land.