In a dump like this, why would anyone truat that any given part of it is authentic? I could tell some great lies by embedding disinformation in a disseminated data dump like this.
So it's most likely just going to be an insight into a different culture/worldview, like reading e.g. /r/anarchism. In many ways this is also the same with the Clinton leaks. Unless one was just horrifically naive of how politics works, there was nothing particularly exceptional in it. The really wild stuff came from interpreting messages as having coded meanings.
(note: arrests, because whether the chats were recorded legally and are admissable to court is a whole different matter)
Read back a few sentences for the context - they aren't willing to ready 77 pages just to seek/isolate messages from one individual around a specific topic. I would expect a journalist to do this repeatedly for multiple individuals, so it makes sense to parse the data and make it queryable without having to read through hundreds/thousands of telegrams just to capture a few dozen