The double jeopardy of being black and female in a racist and sexist society may well make one less afraid of the sanctions against success. A non-subservient black woman is by definition a transgressive- she is the ultimate outsider.
The start of a film is like a gateway, a formal entrance-point. The first three minutes of a film make great demands on an audience's patience and credulity. A great deal has to be learnt very rapidly about place and attitude, character and intent and ambition.