It's very simple really. Cessna had no intent at these aircraft would still be flying let alone still used in the commercial world.
So to cover them selfs and though the detail data they have accumulated thought out the years they developed the system. Now if you don't do it and you have an accident they covered if you have not done the inspections. Cessna all they have to say is we recognised this problem this is the inspection it was failed to be complied with.