I think the song The Morning by The Weeknd is not primarily about prostitutes. There are lyrics that talk about prostitution but I think the context is about different ways of making money. I think the song is more about how fame and money influence your life, sometimes for the better but sometimes for the worse.
Personally, I do not like the song because I think it is degrading to women. The references to prostitution make it sound like women are objects to be played with and paid for if you have enough money to spend on them.