A quote from Mark Twain - "I apologise for the long letter, I didn't have time to write a short one".

Distilling an intertwined set of thoughts down into the single point you are trying to make and then expressing that concisely and clearly is difficult and takes effort. When text is convoluted it's usually because the author didn't know how to do anything different or didn't try because they didn't realise it was necessary.

For those of us for whom English is a native language the problem is less, and I enjoyed the colour provided by the FBI story. You're right though that it muddied the waters of what was actually a coherent and interesting point being made. It is a useful lesson to me that clarity is even more important for non-native speakers.