The sequence shown is clearly intended precisely to highlight the reality of the ornithopters, being a variant of those sequences in war movies that just show c

The sequence shown is clearly intended precisely to highlight the reality of the ornithopters, being a variant of those sequences in war movies that just show cool shots of real things being prepared for a mission. Since the movie chooses to depict these sci-fi elements with that type of images of, I think it is fair to scrutiny them for realism.