you don't do a craniofacial fellowship for esthetics/cosmetics. they have separate fellowships for that. but you do clefts, distraction, craniosynostosis, orthognathic, etc. There is an aspect of of rhinoplasty, lip/nose revisions etc in the craniofacial patient, but you certainly don't pursue that to offer cosmetic services in your practice. Different ball game.
I will, however, say that any dental student who wants to apply for OMS with the pre determined intention to a PRS residency afterwards (not a cosmetic fellowship, but the PRS route that has been posted) should never be accepted into an OMS residency. If I was a PD and knew someone at my interview had that intent, i would end the interview on the spot and wish them a "thank you for coming have a good day" in Apu voice