When I recognize this pattern (reducing one's beliefs to a line of common sense) in someone's writing, I usually take that to be evidence that they're not a quality thinker. I've skimmed the rest of the article you linked from Graeber, and I think my first impression holds up. Like, take this snippet:

> Everyone believes they are capable of behaving reasonably themselves. If they think laws and police are necessary, it is only because they don’t believe that other people are. But if you think about it, don’t those people all feel exactly the same way about you?

Woah, mindblown! If you think about it, aren't you kind of a huge hypocrite and elitist for doubting that others can control themselves? Well, no! We know that plenty of people do, in fact, decide to act criminally and selfishly of their own accord. This line, and many others in Graeber's article, are goofy and I wouldn't take him seriously on this topic.