Jose wrote:
...and we let them
continue to drive just to make them feel independent.

It's not a question of "feeling". If we take the cars away, who will
drive them the six miles to the grocery store?

You are right of course, since we so rarely have alternate
transportation. There are a few "senior ride" type programs, but they
are insufficient. That gets us into a whole new discussion about doing
things for just seniors instead of everybody, and I'm not wanting to go
there because it's one of my favorite soapboxes.

Still, if the drivers are unsafe, you must get them out of the cars.
Who drives them to the grocery store is a secondary question.
Otherwise, you have to ask who will drive them--and others--to the
hospital or morgue.

The same thing exists for ageing pilots, but I don't see it as a major
problem. There are fewer of us, and flying isn't much of a requirement
for normal living as is a car. Unless you are a pilot, I suppose....