This is a very sensitive topic. An overwhelming majority of prostitutes are a product of human slavery and trafficking. I am sure none of them are happy with the turn their lives took. They had little to no say in the matter, so, I don't blame them for the paths they took. A lot of people resort to it in extreme poverty conditions as well. Frankly speaking, it doesn't paint the world in a bright light, as it shows that people have little willingness to support and aid others without exploitation, coercion, oppression and the simple economics of supply and demand.
Therefore, it depends upon the situation. If the people who were involved in such a profession faced the aforementioned factors, then their conditions pushed them to. However, if a person is well-off, isn't black-mailed in any manner etc. but still chooses this profession to earn extra cash ... then they disgust me, as they are trivializing such a horrid reality of life that involves nothing but underground rings, trafficking channels, poverty etc. I won't interfere in their lives, but I'll be damned if I respect such people.