Because, if there's any truth to
this...
"In fact, that story was completely and utterly false," the complaint continues. "Luckey lacked the training, expertise, resources, or know-how to create commercially viable VR technology. His computer programming skills were rudimentary, and he relied on ZeniMax's computer program code and games to demonstrate the prototype Rift. Nevertheless, this fraudulent tale was frequently reported in the media as fact."
...cutting Luckey loose would be a big risk should he start talking.