"The work falls outside normal scope of the person's job."

Maybe in some cases, but not in this case with this agency (SFUSD).

The responses I've received so far from SFUSD (over several years) were each from someone whose whole job is/was dealing with public records requests.

One of the requests that was refused was for a Google Slides deck that was visible to all of SFUSD's ~10000 employees.