Remember: Luhmann's original Zettelkasten is pen and paper, see image link https://m.westfalen-blatt.de/var/storage/images/wb/startseit...
It's only the latest hype around digital Zettelkastens that tout the supposed benefits of mass-linking notes or generating fancy graphs (which I find to be a gimmick with little practical value).
Like any note taking system: Your potential output is what and how much you put into it. No note taking solution - digital or analog - magically produces results without countless hours of input.