> In fairness to Meta: the FTC is the one who initiated this fight, leaving them with the burden of demonstrating it isn't behaving "anti-competitively". So naturally, one of the primary (only?) things Meta can do to demonstrate this is to subpoena...well...its competition...to demand documents which might help them in court
To the extent that you have a problem with the subpoena, blame the judge who authorized it, or perhaps the legal system that makes such subpoenas possible. Meta is not the aggressor here.