No, we just can't advertise or get other clear benefits based on the fame of something well-known without considering these entities.
It is about the overall picture, and in this case there is very high relation to the movie and Scarlett.
Most people have never heard of Her. It wasn't a very big movie, especially outside tech circles. Most of my friends who aren't in tech would have no clue that Altman was referring to an AI in a movie.
I'm not convinced that the pieces all add up to a slam dunk, but you can't dismiss them one by one, you have to look at the whole.