I think we would all confess to having done some one eyed fiddling (easy) in our cars, whether that be with CD players, radios, heating controls, lighting a fag, drinking something, sat navs, or even the hands free phone thingy. I think one of the most concerning ones is when we realise that we have driven 2 miles down the road and have day dreamed so much that we don't even know for sure whether the lights were even green.
But the issue particulalry in this instance in the OP is that she fiddled for 20 seconds. If you close your eyes and count to 20, and imagine that you are driving along in your car (at 10, 30 or 60mph) - its a staggering disregard for driving, car and saftey awareness. I can't imagine what she was thinking - if at all.
So in this respect, those who remain aware but fiddle may remain fortunate, or they might not, others may change their ways, but people like the lady in the article will still be on our roads until they do something horrific that gets them taken off it.