Much of the current public outreach really does focus on people taking their eyes off the road and missing things [0]. Usually in pretty graphic ways [1]. The other main focus is navigation in the car, which pretty much everyone does now, so making that safer is a win.
I wonder to what degree navigation is a fundamentally different case.
A given driver on a given trip is well-shown to be more attentive to traffic and less disruptive if you deny them distractions. (conversation, radio, food, etc)
But it seems plausible that a lost driver is a special case and may be less attentive and more disruptive to traffic if you deny them a navigational aid.
Anecdotally that feels true, though I don't know if it's been studied specifically.
[0] - http://www.ibtimes.com/texting-drivers-take-eyes-road-5-seco...
[1] - https://www.youtube.com/watch?v=Ss021L0hWU4