A flawed character can only accept hard truths from a person that they favor. In this case, a thug will only question his actions when confronted by the girl that he has a crush on.

Oftentimes a movie works towards answering a "big question" -- will he defuse the bomb and stop the terrorists? Will she overcome her problems and get the guy? In a film following a charismatic serial killer without much of a plot, the question can be, "Will he get caught?"