If anything the government attorneys are hurting themselves professionally because they will be blackballed from ever working at Facebook and likely many other big tech companies.
Was the 1990's MS antitrust investigation and case all smoke and mirrors by attorneys for some private gain also?
That seems a bit naive though; of course investigating Facebook is a demonstration of the wielding of power. If they can investigate and punish Facebook, their power and importance grows.
> If anything the government attorneys are hurting themselves professionally ...
Not if we consider their profession to be more of whatever they are doing now; if they do a good job in that, they advance. The more junior people involved in the investigation do good jobs, and advance to better, more senior positions and so on.
Are you saying Facebook should be above the law and not answerable to any government?