The author isn’t just recounting their story, they’re selling it as a lesson in a generic approach that will make you a better engineer.
Whether they can deliver on that promise doesn’t matter. It’s the feeling that’s clickable.
Are we going to criticise every little innocent blog post just because somebody liked it, submitted it to HN and it got enough upvotes?
But sometimes some innocent blog posts get criticised as if they claimed that they solved world hunger. They don't. They are often just some random thought in a rarely-read blog. Nobody intended to go convince a gang of seasoned hackers that they have undisputable wisdom.