Freedom does not mean the absence of constraints or moral absolutes. Suppose a skydiver at 10,000 feet announces to the rest of the group, "I'm not using a parachute this time. I want freedom!"
The fact is that a skydiver is constrained by a greater law–the law of gravity. But when the skydiver chooses the "constraint" of the parachute, she is free to enjoy the exhilaration.
God's moral laws act the same way: they restrain, but they are absolutely necessary to enjoy the exhilaration of real freedom.