Do you believe that freedom is just being able to do what one wants without constraint? If so, why and how?

Sean Greenberg rightly says that the absence of physical constraint does not guarantee freedom. Moreover, as Harry Frankfurt has plausibly claimed, absence of physical constraint isn't even necessary for free will, though it is necessary for freedom. If I start out with free will, you don't take it away from me just by putting me in prison, though you do take away my freedom.