It should go without saying that the people who are most in need of the good prelate's advice are those least likely to heed it. I live in an area teeming with young drivers, such as the depicted, who break every one of the new "commandments" and then some. The few such drivers in the wider world who might actually know what Cardinal Martino thinks wouldn't care. And most other people who would care probably don't need to hear it begin with.
Why such ecclesiastical fatuity? Beyond a misplaced sense of self-importance, perhaps its larger purpose is to provide material for intentional humorists. You gotta love this explanation of where the idea came from!