I had this same issue with my original zettelkasten system in org-roam. Also it had become just, a locally indexed wikipedia.

This book is probably not the greatest resource for establishing a zettelkasten, but it is very good at demonstrating how a good externalized writing system is critical for getting good learning done and finding unique insights. Also, it addresses the wikipedia issue I had specifically. As another person mentioned in this thread, making the notes more like proper publishable writing (even if just a sentence) made a big difference.