Actually, I grew up in a time where we learned how to read and use maps (think Boy Scouts without being in the scouts). It’s a skill like anything else that takes practice. Using GPS nav is not practice. I’ll use the map app to look at the route, pick out familiar references, then uses those as waypoints. “Three blocks past majorStreetName, turn right” type of things.
So you "learned how to read and use maps", and that's a reason to not use GPS, but you won't visit a time zone website despite not having learned to do time zone conversions? I could see how the former is justified rationally but the latter doesn't seem to be.