I believe a victimless crime shouldn't be, and that unless a very strong case is made otherwise for a specific person, people can decide what they want for themselves.
Of course people being forced into sex work is bad, but then so is people being forced into working kitchens or call centers. If they decide on it voluntarily that's all good and well.
Also, since I can't resist:
~~approve of sex work~~ approve sex work
Yes, it's my job to personally rubber stamp every truck stop girl. /s