The manufacture has zero control over the aircraft once its has been sold. really you can do what you like with it. So in that case they set a maintenance program , limited life components , srm sb msb etc etc etc to guild the maintenance of the aircraft though its life.
The aircraft can be any where on the planet they have zero control so its set to the lowest point.
An aircraft that is not being used will have more problems than on that is always being used.
Cheers