Why is this tidbit such a big deal to you? I think you have unrealistic expectations.
Have you ever tried to get a story published in the "mainstream" media?
I've done technical writing. I also spent years explaining my pet issue to journalists, reports, policy makers, other lobbyists.
It's a miracle if the message gets thru mostly correctly.
You ever read a story about topic in which you're an expert? Then you know the press never get the story completely "right".
Even if lawyer Greenwald understood what computer expert Snowden was trying to explain, he'd still have a hard to time running that explanation past his editors. And I'm absolutely certain that whoever is reporting tried to explain novel ideas using layperson's language.