My late DF was one such. He was a truly appalling driver. He passed his test on his 6th attempt, I can only think that the examiner passed him just in case he ever had to test him again. He once managed to crash into a petrol pump when leaving a petrol station. He claimed he "forgot" that his wheels weren't straight when pulling away, ffs.
He never should have been given a licence imo. He gave up driving at 70, and I don't know how he kept his licence so long. He'd had several traffic offences, including at least 2 for driving without due care and attention, and more accidents than I could count.
A friend's father carried on driving until well into his 80s. He was completely the opposite, bloody excellent driver, very focussed, and passed his advanced test at 65. His eyesight started to fail and he stopped, probably sooner than he needed to. He never had an accident, or even a near miss.
I don't think it should be a blanket thing, but re-testing older drivers every few years might be a good idea. I'm sure it would have stopped my DF.