Not sure I feel like engaging too much with pro sex industry arguments, so forgive me for copying a couple of posts I made on another thread.
Where you have 'harm reduction' AKA as legalized prostitution, you have trafficking.
It is as simple as that. We see it in Amsterdam, Germany, Nevada, and the areas of Australia where prostitution is condoned.
To support legalized prostitution is to prop up trafficking, child prostitution, gender inequality and violence against women. They are part and parcel of the same thing.
The people who exploit prostituted women, be they buyers or sellers, do not turn into nice guys overnight just because you make the institution of prostitution legal.
It is just like gambling.
If you create areas where gambling/casinos are encouraged, what happens is you get a proliferation of gamblers and casinos. Alongside this, due to there being a proliferation of gamblers, you will also get people holding private poker evenings and other non-declared gambling activities. And you will also get people who might not have considered gambling to be an acceptable activity deciding to join in because they are being sent the message that gambling is an OK thing to do.
And of course the casino owners are delighted because they get state protection for their activities of bleeding people dry of their money.
The dynamics of prostitution are very similar. Except of course a million times worse because the product is human beings. People seem to forgot that the institution of prostitution is about money. Men pimp out women and girls because they can make a lot of money from doing so. They can make a lot of money because there is a big market for sexually abusing human females.
Legalizing the activities of these predators won't protect women - it will just make it easier for the predators to operate and make money.
Notice how much of the Donna Hughes paper I linked to is about money, markets, she even talks about prostitution in terms of a country's GDP - that is how big a business it is. What is happening in Germany is terrifying - local councils are becoming dependent on tax revenue from brothels and pimps and the pimps are putting pressure on the government to advertise prostitution 'jobs' in job centres and to withdraw a woman's unemployment benefit if she refuses the 'job'. The government has said that they will not do this but there is nothing to stop them from doing so legally.