Salthorae
Imperial Mountain Dew Taster
Why is it a problem?
Maybe it's not a problem? Depends on the table/game/DM. But there is now No chance involved.
it seems like the difficulty of getting there is part of what this DM wants to do.
And now you have DM's asking how to prevent players from going straight to a place on another plane that has been lost or forgotten in time but they know the name of it.
Previous Plane shifts were finicky by design so this wouldn't have been a problem. ON average in previous editions (2e/3.x/PF which are my wheelhouse, no idea how 4e did it) you'd end up 280 miles from your target destination.
Course you use to have the same problems with teleport and now it's either no problem or you just have to find the right formula. No chance.