So does that mean anyone can leak confidential information from any company or government agency without accountability and without recourse for those harmed?

No, that means that the journalist who publishes the information (who signed no such classified agreement) wouldn't have accountability for things that aren't directly related to national security. The individual actually doing the leaking could still be prosecuted.

The people are far more important than the government, agencies, or corporations.

These entities care for nothing but power, vying for it every moment, corrupting everything they can corrupt to get more of it.

It is essential to have a spotlight on them exposing when they go too far.