"I'm 99% convinced that no one actually _understands_ zettelkasten"
Fixed that for you ;)
For real, anyone interested should go read the original book (How to Take Smart Notes[1]) and you learn that it's not about creating backlinks between your notes (that's just a wiki or personal knowledge base). It's about capturing ideas inspired by your reading, etc. and linking them other ideas.
Yes, building your own personal knowledge base can be very powerful, but that's something different.