This article does not tell people to patch Apache. The point, as for as I can tell, is to explore the projects you use so you can learn to write better code.
Then you say "they can't patch the most used webserver in the world like that"
What is "like that"? As far as I can tell it's "working with others". Although I've never patched Apache, I'm confident I'll need to work with others to do so.
The article gives good advice. I don't understand why you would jump to the Dunning–Kruger effect to seemingly assume that the readers are incapable of following the advice.