Market forces and freedom aren't exactly mutual Yam. Anyone that lives in a country with corporate monopolies controlling vital services will tell you this.
Because "freedom" as an entity encompasses more than just trade. If we purely used trade as a definition of freedom, that would label every single country in the world bar North Korea as "free" when quite clearly, a lot of those countries aren't.
Freedom is as much about the right to choose as it is about the right to free speech, freedom of thought and association etc. Trade doesn't facilitate freedom. Otherwise places like China and Saudi Arabia would be considered free countries and they are not.
Answer me this then. Would you consider the average person living in China free?