I think if I could summarize my argument into two main points it would be as such.
1.) While it does appear that brothel type situations in legal countries have the advantage of providing some safety, it is correlated very strongly and obviously with the surge of sex trafficking and in large ways, increases immigration as low income people flock to the country.
2.) There's still a lack of evidence that "regulation" (and the majority of the countries being referenced is all past posts on my part do have "regulation" of all sorts) is decreasing violence, disease, coercion, etc. What sort of regulator is actually going to accomplish its goal? Who will oversee the nation wide brothel registry and "regulate" them?
This is why my proposal to give government a monopoly on prostitution, along with a national registry and licensing of johns, is the only truly viable way to go.