Which is still a good argument for a compass. If I walk south into a cave, I'll at least have a general idea that I'll need to go north to get out.
I'm surprised no one has brought up the fact that the players who are lost and want a map will probably just end up googling one if there's no IC way to obtain one. I agree that a whole moving minimap with a "You are here" arrow would be too much for realism, but city maps and even wilderness road maps seem like they shouldn't be that difficult to obtain (from both an IC and player point of view). I would LOVE if there were more cartographer characters willing to put in the time and effort to make basic maps, and then to be online enough to distribute them. But the fact is they just aren't out there right now.