Remember: consensual erotic power exchange – whatever phrase or group of initials you use to describe it – is about self-fulfillment. Fulfillment for two or more people.
If the bottom, submissive person, slave isn’t happy then he or she will leave. Or be as sad as anyone forcing themselves to stay in a failed relationship.
Likewise the top, mistress, dome must feel that the specific exchange going on with the other person makes her life better and complete.
People who try to live in terms of sexist propaganda, silly sociology, rotten history, idiotic politics and damnable anthropology will be miserable.
There is no one true way. No right way. But any way that is honorable, honest and satisfying can work.