> Why do we leave office workers to figure out on their own how to get things done?
Maybe I'm dense, or oversimplifying, but the answer seems obvious to me: because there's no one size fits all solution. Sure, people can be lost and confused, but being told there is one and only one way to things feels like a straitjacket to me. It's the same reason I despise the term "best practice" as if some arbiter of "best" determined that every other way of doing something sucks.
I'm very much of the eclectic school. I don't follow GTD strictly, but I pulled what I found useful from it and went from there. Honestly, it's been so long since I reviewed the method, it's probably time to go back and review it again. You can't just rest on your laurels; as another good (but often overpraised) productivity book put it, you need to sharpen the saw every once and a while, and this includes always questioning "best" practice.