Hello. You did not present the short film to which this question refers, which makes it impossible for this question to be answered accurately, but I will try to help you in the best possible way.
Filmmakers tend to establish behaviors and discussions among the characters in a film, to humanize them and make them closer to the audience that can perceive similar behaviors in real life and discussions that can be established in the real world. This creates veracity in the film, which together with the setting and the characterization of the characters make the film more realistic and palpable.
