No, the premise of this discussion is not that humans are infallible up to a certain age, but rather that at some point the elderly become more prone to causing

No, the premise of this discussion is not that humans are infallible up to a certain age, but rather that at some point the elderly become more prone to causing accidents. I'm pointing out that what might sound like a sensible mitigation for that can backfire. The control mechanisms of cars should not be messed with lightly.