I reject your Wikipedia links as authoritative sources on what constitutes a journalist as well as your contention that he's doing anything other than dumping documents (selectively).
1: https://www.pulitzer.org/article/race-publish-pentagon-paper... 2: https://www.nytimes.com/1972/05/02/archives/the-times-wins-a...
And, of course he does more than dumping documents. For example, he has to come by them (collecting as a journalist does), which is no small feat considering which kind of documents we are taking about.
If you're genuinely curious, just take a look at his work [1] to see that it's absolutely not "just dumping documents".
Are you going to provide any alternatives, because if not my rejection overrides yours. I would also point out that outright rejecting something without presenting either an argument or alternative why leads up away from productive discussion.