If any other industry reported that 57% of women employed in that industry had been raped during employment, 59% raped 6 times or more, 64% were threatened with a weapon and 73% physically assaulted while carrying out their jobs, I don't think anyone would argue that it was a perfectly respectable form of employment and that many women were choosing to enter into the role without any form of coercion.
For those women that "choose" to go into prostitution 72% were abused sexually as children, 50% were homeless and 50% started their "working" life before they were 18, so really what choice had these young women and children, how many were likely to end up in a loving, caring relationship and be supported into higher education and other opportunities?