Ghostwriter has four main uses.
Ghostwriter has other similar uses.
A writer can also give two NPCs a role and a topic to discuss.

It can also create the throwaway lines youd hear when running through crowds and such.
Ghostwriter spits out barks and writers can edit them.
Other devs have argued that writing barks isnt a pain.

Sure, theyre non-essential and unattentive players won’t notice them, but what dialogue is essential?
But on that note, I wouldnt be surprised to see any big publisher going down this route either.