I know they aren't coordinating, I'm presenting why the author writes about it appearing to be "headless".

Does that mean we could also achieve (or actually are) organisation without coordination?

Yes, this is the utopian goal of political anarchism and arguably much market theory. Unfortunately, it's only as good as the right selection of local rules, and it's very possible that what's good for maximizing one thing has many untoward side effects or requires such a degree of homogeneity as to become unpleasantly restrictive.