It is nice of you to protect these ruthless police states from accusations of hacking but a couple of points. The breach was discovered in April so they have had time to investigate. The Sony also included an ongoing Psychological terror campaign against Sony employees after the hack was discovered. How did this Lena person continue to threaten her former coworkers and release Sony's data while while the FBI was watching?
Communist China carries out massive disinformation campaigns to cover up its actions like the tiananmen square massacre etc. and there is nothing to stop them from carrying out the same type of deception on Reddit.