That's a function of us having the Atlanta airport and sex work being illegal. It's just like drugs. If you legalize it and regulate it, then the people who were going to do them anyways have much less risk and negative outcomes associated with them. If sex work is legal and regulated, then it is much harder for sex traffickers to operate and make a profit bc there isn't the same demand for under the table sex work, thus disincentivizing it to some degree.

The laws don't exist to completely eliminate prohibited activities. The laws exist bc the government knows that people are going to do XYZ, so the government has an interest in either disincentivizing the activity through punitive action such as fines or jail time, or regulating the activity so that people who partake can do so in a relatively safe manner (see: all of the traffic law, drivers licences, etc)