Is it possible to be a sex industry worker and have good mental health?

Are all sex workers products of abuse, or are there mature people with good self esteem who choose to go into the sex industry. The classic image of a sex worker is a person who has been sexually and/or emotionally abused, and who feels they have no choice but to sell their body to survive. Would the sex industry disintigrate if all children were brought up with self esteem and given basic survival skills?