Normally, I just glance at what action I should take next (i.e. continue straight for 2km and then take a left turn at X) and then follow the road signs to do so. But I've noticed some Uber drivers and other people who keep their eyes almost permanently at the app for locating themselves, even when there's a clear GPS or network disconnection, like in an underground pass. This often results in wasted time when the app doesn’t catch up with reality, and the driver misses a turn.
I could probably work with printed turn by turn instructions, but that’s about it.
And I think that probably comes close to what the other post had in mind with „cannot navigate“
P.S: I was born here and lived here all my life.
So they'll end up driving everywhere they go. Work, groceries, restaurants, etc. Always driving. Many won't go down paths that weren't previously suggested by their GPS. And often those destinations aren't designed to be walkable either. Massive parking lots separating the various storefronts. Corporate campuses completely surrounded by a sea of parking lots and garages. Nowhere to walk.
That said, there's still exploring possible in a car-centric place. I tend to take alternate paths to get places, purposefully "get lost" driving around, and explore places I've never been before. But that has costs and lots of people don't bother doing that.
But that doesn’t help me for anything beyond that radius and probably not even there, because those routes go through parks and other stuff, so the car routes would be different.