I can imagine images of people that aren't "non-consensual intimate images" that they'd reasonably still like to be able to block being posted.
One use case I can imagine is doxxing prevention. Say there is a national news story involving some random person in some small town that exposes the persons face and name and rough location. Some group of enraged internet denizens start sharing the person's face and name all over the place as a means to spread their pitchfork & torches mob against them.
Seems like a reasonable feature to me. Recently a professor in my state made some remarks about white privilege and the doxxing of him was so violent and pervasive that he and his family had to leave the state for months, and he still gets threats and needs protection on campus.