Haha. That article exemplifies exactly what he's complaining about. It's poorly written, doesn't clearly explain his point and is basically an ad for his book. He doesn't define what he means by "bullshit" until 3/4 into the article.
Did he have an editor? His article lacked clarity. As for the accuracy, it was opinion piece. That's not a factual thing, as is most communication on the internet.
CYA memos clearly and accurately convey what they're trying to convey. They're trying to CYA. They don't fall under the definition of "bullshit" as he's defined it.
It's true that print media was a lot more edited before the internet. There are a lot of ramifications of that. His analysis is simplistic and unhelpful.
This is just an ad for his book and a good example of what he considers "bullshit". If he could clearly and accurately convey what needs to be changed to create writing that is not "bullshit", the might be a step in the right direction. He has not done that here. Given there's so much access to the internet, there's no way to get everyone to the same level of education and ability to clearly and accurately convey their point.