It takes real life experience to know how devastating the effects of taking your eyes off the road for just a few second could be. Some of the most serious accidents that occurred in the San Francisco bay area were caused by a driver who was looking at his/her phone for one reason or another, and not noticing the the traffic in front was slowing down or stopped altogether, or that someone in front changed lanes, or even worse - a pedestrian or a cyclist was crossing the street.
I realize that driving without doing anything else can be very daunting, especially when you find yourself on a long drive on a freeway. There are far less dangerous options to keep yourself entertained while driving. Listening to audio books or motivational seminars is one option that I find particularly useful and enjoyable, and I suggest this to all my friends. So often we complain that we don't have time to read and learn the things you want. Use those long hours of commute for this exact purpose and you might be surprised how many interesting and useful things you can learn.