My late father was a terrible driver, only my mother would travel with him. She would not believe that he had dementia, she had poor eyesight, they both were adamant that they had a ‘right’ to be on the road. Fortunately they rarely went out in the car, our police officer son tried to persuade them to give up, my brother also tried. The day finally came when dad got lost having taken mum to the hairdressers, the family seized the moment and his driving days were over. He could not see he had a problem, my mother would not acknowledge the problem, even saying that he could drive and she would tell him to turn left and right......she had macular degeneration!
It is worrying that they are not alone in thinking they have a right to drive, I have met a number of families with the same problem, it causes real problems, you can’t make them declare on DVLA form because they don’t want to stop driving. We spoke to the Dr, they couldn’t do anything, we couldn’t do anything.
My 91yr old BiL was furious when he had to give up, in his head he was 21 and very capable.