".....(models, body builders, actors, cleaners, surgeons etc) just in different ways, and others sell their minds (lawyers, accountants etc)"
and
"In reality, though, while she likes to maintain an independent, outspoken persona, sadly, she is a very insecure and sad woman whose relationships with her family and friends have been unhealthy throughout her whole adult life, who has been a functioning drug user, and who has moved from job to job in this time - but has done more than enough to function and cope in terms of "society's norms" which is why she would be able to convince herself that she's not being exploited"
I think this ^^ is at the heart of it.
Whilst other jobs may have an element of "using" the body to earn money, things like OF infact ARE different from those types of jobs because of the real and insidious way they dilute the person's ability to have a real life loving relationship with another person (and a loving relationship with themselves come to think of it).