CD rot is generally caused by failure to keep a CD safely. That means not exposing it to UV light, not scratching it and not getting chemicals that will deteriorate the lacquer.
It is pretty rare for a CD to deteriorate otherwise, and would be due to a manufacturing defect such as a failure to apply the lacquer at the proper thickness or improper application of the bonding material between the foil and the base.
This. In fact, all information out there on CD's not performing all indicate that manufacturing defects are the cause and that it is uncommon. Certainly less common than vinyl warpage, wear, needle burn, and off-center spindle holes.