Point of the return to NLC scroll?

To be able to get it, you have to go through a lot of hard work, but I don't see the point in it.
If you use a return to town scroll anywhere in NLC now, that will bring you back to town, and if you use one in the Phantom Forest or CK, it will take you to the mansion, one map away from NLC.
So why would you need these scrolls at all? <_<

They ... save me precious magic rocks (that I'm too lazy to run to nath to buy)?