Besides making roads safer, I wonder how long society can go on without re-testing people's competence for moving tons of steel at 60 miles per hour on a regular basis.
There's very few dangerous activities that don't require regular re-certification and training, and driving really shouldn't be an exception.
Some main contributing factors to road fatalities are going too fast for conditions, exceeding the speed limit, failing to look properly (left turns!), reckless driving, and various forms of inexperience.[1] That means it's mostly people who don't know/forgot how to drive safely and mouth breathers who don't realize most traffic laws exist for a reason and are written in blood.
Can't hurt to remind people occasionally and make sure they can actually be trusted on roads.
[1]: https://www.sciencedirect.com/science/article/pii/S000145751...