This is BS. GPS reduces your cognitive load, because it navigates for you. Without it, you have to look at a map (which is extremely dangerous while driving), you have to look for street signs, you have to try to read building numbers from the street. It's extremely distracting trying to find a location in a place you've never been. GPS takes care of all that for you.
People like you always talk about the GPS device being distracting, but how is that better than having no clue where you're going, or trying to read a giant paper map while you're driving and you've missed a turn and there's no place to pull over? You seem to basically be assuming that people should be able to memorize an entire map just by looking at it, and then somehow magically know which road is which even though the signage is frequently horrible. The real world doesn't work the way you think it does.
People like you always talk about the GPS device being distracting, but how is that better than having no clue where you're going, or trying to read a giant paper map while you're driving and you've missed a turn and there's no place to pull over? You seem to basically be assuming that people should be able to memorize an entire map just by looking at it, and then somehow magically know which road is which even though the signage is frequently horrible. The real world doesn't work the way you think it does.