Well in the era of Watergate it wasn't like dumping the information onto bit-torrent was a viable option for the investigative journalists. They had to write it up in article form just to communicate their findings.
Unless you have a better reason than "it's different and weird", your objections are just like those of a grumpy old man complaining about the music the youngsters listen to these days.
I'm not objecting to Wikileaks, I'm objecting to Assange calling it journalism.
I've gotten downvoted simply because people are emotional over this -- as if I'm attacking them.
I then read a tonne of definitions of the word "journalism" and to me. They pretty much all just say journalism is getting the facts out there, in any form. There's no requirement for a journalist to make a "report", for it to be journalism.
I would be interested to see more examples of journalism where no report was written.