I have Organic Maps, because I thought it would be nice to have in case of an emergency where I don't have internet, but sadly just a few weeks ago, I had such

I have Organic Maps, because I thought it would be nice to have in case of an emergency where I don't have internet, but sadly just a few weeks ago, I had such a case and Organic Maps couldn't find the address and the map itself didn't have all the roads on it (nor satelite or topology map), so I couldn't even use it as a normal map... In the end I had to resort to one archaic ways and ask local humans for directions... Google maps does offer being able to download for offline use, but if you don't have internet it quite often doesn't want to do navigation, unless you trick it with saved directions. How does Garmin do it (I'm guessing map licencing issue)? And how come this isn't already a solved issue?