Senior citizen drivers

Imagine this scenario:
You’re driving down Main Street. You’re totally aware of your surroundings and you’d like to think your doing a good job driving.
Suddenly, that grey Lincoln with the veteran license plates starts veering out of its lane into yours. Thinking fast you slam on the brakes to let it cut in front of you without so much as a signal light.
Shocked you look up to see an old, fossil of a man, with glasses thicker then your windshield, barely able to reach the steering wheel, gliding on past at 10 miles an hour

Obviously this is no problem. It’s perfectly acceptable to force able bodied teenagers to wait until their 17 to drive by themselves, even then with more restrictions. Senior citizens who are over the age of 80 and can’t see, hear, or barely move, should definitely be able to have more driving priviledges then teenagers.
A kid used to be able to go down and get their full license the day they turned 16, and start driving right away. Now, you have to take a written test, and be with a parent for a year, then you can take your road test and only have one friend in your car for another 2 years.
This is completely fine. Who needs to take all their friends for lunch? It much easier to exclude people and only have one friend.
And it definitely a lot safer to have kids ducked in the seats without seatbelts hiding from the police.