Especially in Canada. The directions are basically to get on the highway, and stay on it for 1000km
They would have no reason to leave this highway unless maybe they wanted to take the shorter route through the states, but I have no clue how they could have ended up where they were in the middle of nowhere not even on a road. Glad they were ok, but jeez, common sense or look at a map at least once.
Always agree it's best to look at a map to get a feel for the route or at least have one ready.