Adults are free to make a wide array of legal, ethical, but nevertheless terrible decisions. An example is poor dietary choices.
All jobs are a conversion of time/skill/knowledge/strength/etc. into a fungible token, money. That fungible token is then used to meet other needs: food and shelter being top of the list. In many parts of the developing world, a person cannot eat if they don't work that day.
In the best case scenario, you come out ahead - where the resources you put in are returned n-fold. An I-Banker grinding out 80+ hour weeks is giving up time with friends and family and perhaps compromising health. Is that person exploited?
Anybody who has driven for a ride sharing company understands that their vehicle will take on excess wear-and-tear and they have to pay for gas. They presumably compare against other jobs and pick ride sharing driver freely.
I would say it is rather condescending to refer to adults making informed decisions in their own self-interest as vulnerable and exploited.