Of course, there are many women who become exotic dancers or adult models solely for the paycheck, but you could say that about nearly any field. How many little girls (or boys) dream of their ultimate career as a housekeeper or telemarketer?
On the other hand, it is a gross generalization to suggest that no woman ever chooses to be an exotic dancer. I have several friends and acquaintances--women I met through typical social channels--who have willingly chosen exotic dancing and other sex-related work as a career and truly enjoy what they do. To insist that no woman should take a job displaying or exploiting their body is its own form of sexism.
It's probably fair to say that nobody dreams about being a booth babe for a switch company. But that's how the service industry works: unless you have more inquiries than you can handle, you don't really get to pick and choose your customers. Sometimes the work is fun, sometimes it just pays the bills. I'm sure the caterer who was backstage refilling the warming tray with hot dogs wasn't living their "dream career" at the moment either.