What about some sort of compromise?
What if we give new players a VERY rough map of just Hydlaa to go along with their "Letter from a friend." This map can be pretty much exactly like an editable scroll except it will have a very rough outline of Hydlaa as the background instead of just a blank slate. By editing this map like any other scroll, players will be able to add details to the map and mark important locations/NPCs/etc. For a start, the map should have markings for people/places mentioned in the letter (aka Harnquists shop, the library, maybe the temple).
Personally I love the idea of RP cartographers. I've bought an herbal wilderness map in-game and love it. I wish there was more of this. But the fact is I haven't seen it at all and I've been playing for a while. New players aren't going to have a clue how to find one.
Cartographers will still be able to map out the wilderness for various purposes (hunting maps, mineral maps, herbal maps, general locations of interest) and would still be able to provide "completed" maps of the cities. But a simple map of Hydlaa would make sense to be given to newcomers ICly and would help new players a lot.