Yes, professional sports people do feel taken advantage of. Did you not just see the NBA lock-out? Players genuinely feel like management is taking advantage of them. See this excellent Bill Simmons analysis over at Grantland: http://www.grantland.com/story/_/id/7250994/business-vs-pers...
Very good point! My argument is that feeling taken advantage of does not necessarily mean that you are being taken advantage of, at least in an economic sense.