A few years ago we were traveling through Connecticut, our Garmin told us to turn left.
A left turn would lead directly into a river. There was no bridge and no evidence of a bridge ever being at that location.
There were no bridges in either direction for several miles.
My paper map verified that there was no bridge or road crossing the river at or near that location.
I trusted the map, not the GPS.
A GPS is a great tool but, maps are also tools.
And, I agree, putting your total trust in either can get you in trouble.
Enjoy your travels.