Am I unreasonable in thinking that age, anxiety, medical problems, etc, are not an acceptable reason to drive in such a poor way that it is actually dangerous? There has to be a minimum standard for driving and if for whatever reason you can't meet that standard then you should not be driving?
My neighbour's mother is nearly 90 and still driving. Her driving is appalling but he says, well it's her independence, if she didn't drive I'd have to take her around, people round here recognise her car and know she's elderly, etc, but I just cannot accept those as good enough reasons for her to still be driving.
Please note, I am absolutely not suggesting all elderly people or people with medical complaints (I have some myself) are poor drivers or shouldn't drive. I just very strongly believe that these are not good enough reasons to excuse very poor driving.