I would love to hear from a woman who says "I thought about parking cars, but then I saw Pretty Woman and decided to become a hooker so I could tame and land a Billionaire."
Both Viv and Edward are whores. Both have sold their virtue for money, and both regain their virtue by finding each other. That Viv's prostitution is literal and Edward's is metaphoric is a detail, and, in this case, the details don't really matter.