While I agree many posts are full of shit, I think it's important not to throw the baby out with the bathwater. There are tons of HN posts that I find incredibly insightful and informative. The ones I like usually fall into 2 categories:
1. They are a detailed description of something the author actually did, and show a really cool solution or implementation of something. They don't always have to be jaw-droppingly amazing (though some are), but they just have to show that the blog post is the outcome of the work, not the other way around.
2. The author has been thinking about a problem for a while and brings a clear, informative, well-argued insight to the problem space. E.g. this post, https://news.ycombinator.com/item?id=37509507, is one of my favorites that helped me understand phenomena I was definitely aware of but hadn't yet tied together.
For me, this "folksy wisdom porn" is a cheap, bad, superficial version of #2 (FWIW, I think what you describe as "a novice who just discovered a minor technical detail that is superficially new information" is the cheap, bad, superficial version of #1). It has the veneer of some sort of deep insight, but when you actually get to the details and try to understand it, it either just doesn't make sense or is essentially word salad.