From my perspective, It's not really about making anyone tell the truth, or even having them face punishments.

Take the words from the series Chernobyl:

You can't possibly be that naive... What you're proposing is that Legasov humiliate a nation that is obsessed with not being humiliated.

Leftists are power mongers. Power is illusory. The delegitimization of power by humiliation is a major threat. This is why lynchings and struggle sessions exist. In a just world, every one of these mother fuckers would rot to death in a cell for unleashing a system of industrialized psychological and emotional abuse upon the general population of the US for their own personal political and monetary benefit. But we do not live in a just world, so the correct option is to damage our enemies where it hurts them the most: their sense of power. This is why mockery, insult, and even comedy are explicitly banned by all authoritarians and tyrants. It is subversive to their sense of authority. Because power is illusory, the loss of perceived authority, is a loss of true power.

The public humiliation of an interrogation by Project Veritas, while not being a Struggle Session, will do plenty of damage to their credibility.