I understand where you are coming from. Heck, I get a senior discount playing on certain golf courses!

I have had/witnessed to many old people driving cars that should not be behind the wheel. My mom is one of them, she is a danger to herself an others and could never pass a basic test on driving skills written or road test. Out of love we took the keys away....we all know when that should happen based on each their accidents and inability to comprehend road signs and conditions.
I agree and probably a better way is a periodic eye or driving skills test for everyone....it would assist in weeding out the bad and dangerous without targeting one group.