Precisely why you shouldn't be on your phone when engaged in an action that has the capacity to kill people with even a simple error on your part. Should be common sense...Then again, we need laws in effect to get it through to people that this is bad.
My nephew was driving, took his eyes off the road for a split second to retrieve something, his vehicle swerved, hit a rock, flipped the vehicle, through him out. Took him 19 months to die from that one split second of not paying attention.
Everyone is this family is now extremely aware of the need to pay attention while driving.