I get the arguments that Meta is forced to defend it's claim it's not being anticompetitive, but isn't part of a small business like SimulaVR's sole competitive

I get the arguments that Meta is forced to defend it's claim it's not being anticompetitive, but isn't part of a small business like SimulaVR's sole competitive advantage being secretive with it's plans because it doesn't have to publicly state everything it's doing? Wouldn't this take that away from them? Is it not a simple enough point to object to the subpoena on?