While there are many negative reasons for people to become prostitutes, I think there actually are some different cases. In some places prostitution is completely legal. I have never actually talked to a prostitute, but according to some reports there are prostitutes who just choose it as a profession. In places like the Netherlands prostitution is legal and highly regulated. This can make it a safer profession for people than in places where it is not regulated. I read about two twins who are the oldest prostitutes in the world. They have been doing it since the 60s and in their interview they seem happy. (https://www.aol.com/article/2015/09/23/sisterly-love-worlds-oldest-prostitutes-reveal-secrets-to-a-ha/21240090/)