You underestimate the power of G-d..these young girls, if anything, were given a different direction to turn...and by the way, I am sure that in your own life, someone that was completely out of your life made a difference in your life, so I wouldn’t completely poo poo the efforts of a good hearted person.
You underestimate the power of money. These women can pull in more than $50,000 US a year when they would otherwise be making about $4,000 US at a normal job. At the upper end they can double or triple that. They are there by choice and no amount of preaching to them about how it is morally wrong in YOUR world is going to change that.