The strange thing is that in both cases we are often talking about vulnerable people (less true for people who join the army with a view to do officer training).
The images we have in our head for what constitutes as a 'vulnerable man' and 'vulnerable woman' are very different despite the definitions being very similar. Likely to get into crime, harmful use of drugs, alcoholism these are all halmarks of vulnerable people but men have a societally acceptable way out, the army. For women (who make up the majority of sex workers) there is no such option.
Why can we not see sex work as a genuine service to society not just for the workers but also to alleviate the anger and frustration of those who have difficulty getting sex otherwise?
For instance, people may lose unemployment benefits if they turn down a "suitable" job. I cannot imagine anyone would want to extend this rule to prostitution.
It's not news in the UK that one of the side effects of tuition fees has been a big increase in student-age women funding their courses by selling sex.
You can argue whether this was an intended or unintended consequence.
But for anyone buying, it's hard to argue that increasing supply and lowering prices isn't a happy result.
"Love you long time, five dallah" and the ensuing event takes three minutes which works out to $100/hr while the dishwasher makes what, %7.50? $100/hr vs $7.50/hr, hmmmm. I have known nurses and teachers who worked their way through college in the sex trade. They were incredible people who likely had no student debt.
This sounds true if you have a choice of jobs. But with "regular" jobs, we accept that someone can be forced by circumstances to take such a job, even if it isn't the greatest job in the world.
Suppose a friend of mine is unemployed and complaining about money problems, I can imagine myself saying "So why don't you just take the job of a dishwasher until things get better?"
But I can't really imagine myself saying "So why don't you just sell your body until things get better?"