I'm sure she COULD make more money by actually taking dicks. I think a lot of attractive women could make more money in sex work than at entry-to-mid-level jobs.
Thing is, taking thirty miles of dick convincingly is more difficult and strenuous (and gross) work than being a bikini waitress. Contrary to certain opinion, it wouldn't be just laying there limply and letting someone go to town on you for 8 hours a day
Just goes to reinforce that Russell believes every woman has a price, and if you offer enough, you can make a hooker out of any woman.