Island Sanctuary Teleportation

[Rilifane]

It would make sense to first only get there by boat and Lower La Noscea is the closest dock..
And later, through upgrading the island and increasing your rank, you can build an Aetheryte so everyone with access and the owner itself of course can teleport there. I hope they consider it for later upgrades of the feature because I think they would've mentioned it if it was already part of the upgrading process.

[Thurmnmurmn]

It's most likely a technical reason. I mean we're talking about everyone having their own island. That means they would need to set a different teleport for everyone individually. There's no instance I can think of where you can teleport straight to a personal area.