I used to manage networks and wondered, while reading the article, why it gets so many points on HN, when it only states obvious things and doesn't really go in

I used to manage networks and wondered, while reading the article, why it gets so many points on HN, when it only states obvious things and doesn't really go into detail. And then I realized most people these days have no idea about how packets get from here to there, or even that there are packets at all. Now I understand the appeal, but I guess this means that good introductory material is badly needed.