It is a matter of the bending of the will. Before we are saved our will was to practice sin-we never do the things of God. After we are saved God bends our will to desire and follow Him. So believers DO have a choice to follow God's will or our will. But if that will was "free" that would mean that we would ALWAYS follow God's will, would it not? But that is not the case.
Our will is to be disobedient. God puts His Spirit in us to cause us to walk in His statues and obey His ordiances. Now would you say that sounds like being puppets?
That.
Slaves don’t have a lot of options.