If I have to pass a yearly exam to prove that I am not in some form of cognitive decline just to have the same rule apply to every other person, including politicians, then I'm all for it. Same goes for driver's licenses. My grandmother, who is 91, just renewed last year. She told me over the phone, "This will probably be the last time I ever have to do that," and I just thought, "I sure fucking hope so." I'm not against older people doing what they want to do, but reality and safety have to come into play at some point. People break down as they age. I'm dealing with it now, and I will continue as I get older. I have no illusions about it. The feeling that you are entitled to whatever you want regardless of the safety of others is something that we as humans need to drop, or it's gonna be the end of us, as evidenced by the current state of politics.
Am am fully in agreement with you. However, in this society, some people will attempt to continue to do the same things they used to because they have no other choice. A lot of people (in the US at least) don't have a retirement plan whatsoever and social security alone is nothing to live on for a decent life.