Until a friend or relative has applied a particular proverb to your own life, or until you've watched him apply the proverb to his own life, it has no power to sway you.
My father in the film - which we probably haven't seen in previous movies, and in British Asian movies you could probably count on one hand - he says exactly why, actually why he's frightened for his daughter. He came to this country, England, and had a bit of a crappy time.