That's one good example. A generic outline explaining what the movie is about and someone writing about their experience with that movie are vastly different. Take the human personal experience out and that makes it incredibly difficult for someone random to become someone you know. Starts somewhere. Follow the rope, it ends at a human.
And what made something like Siskel & Ebert a success in its time was the fact the viewer was given two personalities to connect with instead of just one and they talked about what they thought, not what they saw.
Those making movie trailers. Tell me how successful they'd be if all they did was report on what the movie was about. The dude with the voice is there for a reason, giving it personality.
Take science. Report on findings or theories in a Youtube video. 500 views. Add a personality and combine it with the same information. One million views.