I think Zettelkasten adherents tend to be too dogmatic in exactly what qualifies as a save-worthy note, how and where to file, and what to keep longer term. As noted in Evergreen notes, many of these people are specialists in note taking, rather than in producing written work from them. When I tried to follow that method very closely some of it felt like busy work for the sake of OCD archiving, and others felt like deletion for the sake of only keeping “pure wisdom”. The system surely worked for its creator, but that doesn’t mean it must work for ever work flow.
My own advice - think about your workflow and work backwards in your current process, thinking about how modified note taking and organization can help those steps. Apply Zettelkasten, Evergreen, and other methods only where it feels appropriate and productive. Be willing to diverge from the “official” method, keeping your own workflow in mind.