This is a line that justifies the "authorities" view of things. It does not add up.
To blame hackers that, maybe, stole source code, for vivendi's problems is like blaming Saddam for the war in Iraq. It is a smokescreen. Iraq was invaded for oil. These hackers are being blamed for the gross mismanagement of Vivendi.
People here are gamers, they do not care about finances or Wall street. None of them will know enough to dispute what you say. If they were to investigate vivendi, and what has occurred over the past years, they would find that management basically drove the company into the ground while taking lots of money for themselves.