I hear about countless examples of elderly people or people with health problems getting behind the wheel of a car when they shouldn't be. Why do they do it?
I remember my dh's granddad doing it. Now it's my dad. He's 78 and can barely walk without falling over and he refuses to accept that he shouldn't be on the road. About 6 months ago, he accidentally drove over a pedestrian island thinking it was an actual road. I pointed out to my mum that him being old wouldn't count as a defence. She still gets in the car with him(!)
And before you say why don't I report him, it's easy to say but I've reported someone before for the same sort of thing and he figured out it was me and went mad at me. It's even more difficult to report your own parent.