to be honest, I'm in favor of decriminalizing prostitution. the question was what makes it different from other professions, and I offered my view. I do think it's particularly exploitative, but there's no way to draw a hard line for that as you illustrate. I think it's worth weighing that sex trafficking thrives in jurisdictions with legalized sex work, however.
as with most issues, nuance is key
I'm perfectly okay with fathers telling their daughters "This is something you shouldn't do", but once you get the state involved you're limiting the freedom of people who've thought it through and decided to go ahead anyway.