Legalization does not benefit the people selling sex; nor does legalization produce female empowerment. What it does is serve the owners of brothels, pimps and the johns who frequent them.
Every country in the world has prostitution, the longest running profession. The only difference within prostitution is the legal status surrounding it.
It's impossible to describe the relationship between politicians, lobbyists, corporations, and campaign cash -- and have it come out sounding different than what a prostitute does for a living.