Honestly not sure why this is any sort of surprise. I very occasionally read UN reports for work. I very frequently see journalists covering those reports using the press release, clearly not having read anything else. And then I see low quality media reporting on the topic clearly having read only the third party reports. When journalists - whose job it is - don’t read them, it’s expecting a lot for anyone outside of the political/lobbying establishment to read them.
Yellow Journalism: Reading a tweet.
Journalism: Reading the press release.
Investigative Journalism: Reading the report.