> There are a fair number of people in the world who know exactly what they're doing. That seems like a very broad claim that can't possibly be true without so

> There are a fair number of people in the world who know exactly what they're doing. That seems like a very broad claim that can't possibly be true without some sort of qualification. Are you saying that there are people who know 100% what they're doing 100% of the time in 100% of endeavors across every category relevant to living life? I feel like what you mean to say is that there are people who know exactly what there doing when it comes to X, where X is a well-defined, specific subject-area. Assuming that statement is true with the scoped qualifier, even that wasn't always true for this hypothetical person. They had to have learned how to do X and gained enough experience over time to know exactly what they're doing in the matter. Which means, there was a time when they didn't know what they were doing. And I'd say this hypothetical person at that hypothetical time before they knew what they were doing is really the target audience for whom the article was written.