It allows each of us to be responsible for shaping our lives according to our own coherent or incoherent - but, in any case, distinctive - personality.
Because there is an audience in every country that will settle for a vaguely coherent story, cliched situations, but regular albeit low budget punch ups.
It summarizes the predominant directions of the gradient in a specified neighborhood of a point, and the degree to which those directions are coherent.
