All of the reasons that you cite for prostitution to be illegal; health, drug possession, assault, murder, etc. are due to it being an unregulated illegal business. In Nevada, in the areas here prostitution is legal, the brothels have none of those problems.
So all you are left with is morality.
The real problem is that society while attempting (and failing) to regulate morality has created a breeding ground for disease, drug possession, assault, murder, etc.
Legalized and regulated prostitution will lead to a reduction in associated crime levels while police costs (and taxes) drop. Remember legalized prostitution means prostitutes paying taxes.
pure nonsense.....
taxes you say....they will pay taxes?
now, let me get this straight...according to reports, most men that go to prostitutes go there to get sex other than normal sex...they go there for oral and anal sex....
how do you prevent the spread of disease with oral sex....what man is going to want oral sex with a condom on....it is not going to happen.....
legalize prostitution but you will never ever prevent the spread of disease....there will be too many under the table deals ...
of course, the other equation is that almost all prostitutes are drug addicts or alcoholics but you wouldn't care about that now would you...
Morality is a religious issue and is the prerogative of the church.