It is total quackery. When you zoom out in these discussions you begin to see how the AI yappers and their methodology is just modern-day alchemy with its own jargon and "esoteric" techniques.
What makes it quackery is there's no evidence to show that these "suggestions" actually work (and how well) when it comes to using LLMs. There's no measurement, no rigor, no analysis. Just suggestions and anecdotes: "Here's what we did and it worked great for us!" It's like the self-help section of the bookstore, but now we're (as an industry) passing it off as technical content.