That's really strange; says far more about the author that they don't believe someone could possibly have read a book before seeing (or not have seen) a derivative film.
I think she is pointing out that the makers of soylent say they don't have the time to prepare ramen, but they had the time to read the book instead of watching the film.
And the story behind Soylent™ is basically just s/food shortage/time shortage/, no?
Or what else is the point?