An airworthiness directive was issued to remove the wings to inspect affected PA 28s and PA 32s with more than 5,000 hours. It was later rescinded when reports from the field showed that to be an overreaction. Prolonging the life of an aircraft is similar to extending human longevity. Take care of yourself, and chances of living longer are improved. However, with aircraft the role of heredity has not been established although some of the type clubs will have some strong opinions on that topic.
Heredity does seem to play a part in ADs that are issued against a particular aircraft.
These frequently grow out of design decisions that may have been made decades ago. As a result of accident investigations and inspections, the FAA may issue an AD against a part that has shown to be a recurring problem. The age of the part frequently plays a role. Stress cracks develop, seals fail, or corrosion begins. The list is endless and frequently is as much a symptom of old age, and possibly inadequate maintenance, as of poor design.