Another comment point out: "For a very specific definition of “success.”". Some might read the article as "this is how you make a lot of money". I read it as how to be appreciated/valued/be indispensable. Neither is necessarily wrong, but you correct that if you goal is to be richer, monetarily, then the setting in which you apply these advise will make a large difference.

In a corporate setting, the advice on: Get good at sales, Be hard to compete with and Build a network, will get you much further than working hard. Working hard in large corporation will in many case only grind you down, if don't manage to make your work visible. It's not only in the US, other countries don't view working hard so favorably anymore, and I think it's due to it being tied more directly to stress, rather than success. Hard work alone will make a person stressed, but does not guarantee success, selling yourself and networking will be much more likely to result in success if applied alone.

Overall it is good advice, as a whole, perhaps more so if just want be happy in you profession, feel secure and have a sense of belonging.