That "but they do sometimes make me miss an exit" is the distraction.
Listening to words whether audio books or a phone call is more distracting than just music which you simply tap your foot to. It's the concentration which is needed to discern the words and their meaning.
Yes, enforcement is the big problem. There just aren't enough cops to catch people driving recklessly, which is easier to spot, let alone using a cell phone. It's another law on the books to add to the multitude of others, which is not really all that enforceable.
Joy A. & Lily
and "Puff", too
No. Ca. Sierra Foothills