On Sönke Ahrens's book How to Take Smart Notes

I'm in academia, currently working on my dissertation and planning to start work on my first paper. I discovered the Zettelkasten method by pure coincidence. My first instinct is to watch YouTube videos which I find completely incomprehensible. Many of them simply present their super complex linked notes on Obsidian without any concrete explanation. So I thought the best thing to do would be to read a book on the subject. Apparently, Sönke Ahrens' book How to Take Smart notes is the best there is. So I started reading it and am now halfway through. I'm even more puzzled. The author keeps repeating the same thing in different words. For example: “Do you have trouble writing, taking notes and organizing your ideas? That's what the Zettelkasten method is for, so start using it. Why don't you use it? You should be using it to be more productive."

I don't know about anyone else, but from this short interaction with this “method”, I think it's just a hype that all content creators talk about to make views and sell their courses. Even its “presupposed” inventor hasn't written anything about it.