I'm starting to wonder if you are trolling this forum honestly...

A dominatrix has the role of dominating the client, it's just a different service, and it requires a lot of training and skills. Clients who want to see a domme aren't seeking to have sex.. A lot of them do cum during a session depending on what they are looking for. But a dominatrix has a different role from an escort (who might or might not dominate her clients during a booking that involve intercourse and similar types of activity). A lot of clients want a session with a dominatrix because they want to relinquish control to a woman, they have different needs and aren't seeking to have sex.
BTW GFE isn't just ''to cum'', a lot of people book GFE because they want companionship, kisses, etc. You can engage in sexual activity and cum just with a massage or FS session.
GFE usually involves kissing, daty and bbbj but doesn't involve a lot of more ''hardcore'' sexual activities.