25 years ago the red light district was a no go area for except for people looking for sex or drugs. But in the recent decades that has slowly changed. At some point it became fashionable to live in the old city centre and in the red light district housing was cheap. As soon as those 'normal' people were living there they started to complain about all the noise and the shady figures that were hanging around. And the city government listened; now the policy is to make the Red Light district a normal neighbourhood for families and what not.
>> But the real issue is that none of the girl prostitutes are locals.
This has a simple reason: the red light district is all window prostitution, and as a local girl you wouldn't like to be standing there when your uncle or some friend happens to be passing by.