The attitude of 'behave as I want, 'cause there's plenty more where you came from' is not just a fantasy threat, sadly. Will this make us better people, or will it make us bitter? My view is that a power exchange relationship is the same as any other, in that both parties have to be suited to one another. Interests in the kinky do not create a match in itself.
By shere statistics, there will be many submissives that will never find their domme/dom soul mate. They will have to reach some inner peace as best they can, and be content with fantasy.
Of course, this could all just be in my head! Enjoy these fantasies where the ladies play for keeps...