albion1971:
How many admit to having avoided dozing off due to a good natter on the hands-free to relieve the boredom?
Now grumpybum that would be a really stupid thing to admit would it not? A good driver would pull in and have a kip not make a call. 
No, it’s not stupid - no more so than turning up the radio, opening a window, drinking coffee. It’s just another method of keeping alert. In these days of cruise controls, automatic gearboxes and other devices designed to make the driver more bored, we often feel tired due to boredom, not actually needing sleep.
A good driver knows when speaking on the phone or any other activity is interrupting their concentration. When I need to reverse or find my way or carry out a difficult manoeuvre, I will not be on the phone. I will also switch the radio off, and oddly - also take my sunglasses off! 
You would be happiest if everyone was chained to the wheel in the ‘ten to two’ position, no radio, no phone, no coffee, no passenger, no food, no singing, no scratching, and no looking at anything along the road that isn’t directly related to your journey.
I’m sure there are reports backing up all of the above - but we are humans, we like to talk to people, to look at things, to enjoy the journey. Not one of us would wilfully cause an accident, and we all to our best to avoid them and to protect other road-users around us.
You do tend to take things to extremes. Maybe we should just stop driving. Because that is the only way that more pedestrians, cyclists and other road users will not be hurt on the roads.