Exactly. That's why the public hearing was held. To make her and the case famous. This is how you play the game. Now Meta can still sue but it risks damaging its public image by going after a famous whistleblower.
One of the benefits of having a lot of scandals. Will get buried in the noise. Those that care about this kind of stuff already hated meta, those that don't care won't start caring now.
> And an NDA being void due to such a situation does not stop the company from taking legal action against, costing you lots of money and time to defend
Not really. If the NDA is void (such as the case with congressional hearings), there isn't going to be a lengthy legal proceeding. The judge would look at it and throw it out.