They're trying to convey something else, then obscure it in the name of CYA, so everyone reading has to decode what you're trying to say without putting YA on the line. It is wasted effort, but it has more to do with working in an authoritarian organization than not knowing how to be more clear.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.
I disagree that CYA memos are wasted effort. They serve an important function. They are documentation and internal paper trail devices that give the person's stance on something. If there's an issue that's blowing up around you, it's important to create a document about why you did or did not take action, what authority you had to do it and why you took that action. In the memo, the original issue is likely to be obscure because in order for it to be clearer, the person taking a stance would have to point a finger at the person they think is at fault. It's better not to do that. It's still a clear and accurate portrayal of what the person is trying to convey. They're trying to convey a CYA memo. I agree that it has to do with working in an authoritarian organization, but almost all organizations are authoritarian by their nature.