Hi Attila - the main reason is that there just aren’t enough volunteer curators to help resolve all flags in a timely manner. To get the attention of active curators, you can see a list of people who have recently resolved taxon flags here (last column), and perhaps @ mention one in the comments section of your unaddressed flag.
The “content author” is often blank when taxa were auto or mass-imported, and it has no bearing on whether a curator will or who will resolve the flag.
Note also that adding a missing conservation status (e.g. “Vulnerable in Country X”) and whether the taxon should be auto-obscured are two different changes, with the latter often requiring a more in-depth assessment and discussion. You can read more about when auto-obscuration should be implemented for at-risk taxa here: https://www.inaturalist.org/pages/curator+guide#geoprivacy