Google maps also sucked in India until a couple of engineers flew there to figure out all the idiosyncrasies of mapping/routing and spent a bunch of time implementing regionalized fixes for them. Apple expresses some very clear preferences in what regions they support well in Apple maps, which exclude most "difficult" areas.
The common wisdom is that Apple Maps works significantly better in the Bay Area than anywhere else on Earth, because the engineers file bugs they encounter on their commute.
Yeah, so much of Google's moat in mapping is just the sheer amount of human time thrown at the problem of all the little regional idiosyncrasies all around the world. Getting that right is what makes it so hard.
