The beard signifies the courageous; the beard distinguishes the grown men, the earnest, the active, the vigorous. So that when we describe such, we say, he is a bearded man.
Madness string 19492
Some of them are intentional from the writers, and some of them are just what people see in it. Cinema is art anyway and just as much of art is about what you take away from it or how you personally interpret things as it is about the artist trying to convey any particular idea or emotion. Art is as deep as the thoughts and emotions it inspires in you.