The way i would frame this is that tag systems have a steep return on effort expended. Low-effort tagging is garbage, as you have observed. But when users stay

The way i would frame this is that tag systems have a steep return on effort expended. Low-effort tagging is garbage, as you have observed. But when users stay on top of it for some reason, it can be extremely valuable. Someone else mentioned the example of AO3 here.