You work for a corrupted company and either (a) not know, and/or (b) not care for years. Suddenly, the police come swooping and people start to blab in public about all the naughty things going on right under your nose as your job is to inform the public about naughty things, and yet you are drawing a pay check from those kinds of skullduggery. When you report on things once the gig is up, it's not an exposé. The chances that you will still be employed there for much longer are very slim.
So threatening to resign is not impressive. It is face-saving.
And calling any self-preservating attempt an "exposé" as the Washington Post did is proof that journalists do not actually know what an "exposé" is.
It is a misdirection to deflect attention away from the fact that you (a) were asleep at the job to the point of dereliction of duty, and (b) you work for people who get raided by a government agency.
What this is an attempt at a plea bargain in the court of public opinion. This should have been a very long time ago before the cops came in to crash the party. It is not impressive, and it is not journalism.
It is spin.
And when spin is mistaken for an exposé, you know why the profession destroyed itself in the first place.