Well there are things in scripture that I am curious about, such as the case with cain this would be a good example of free will in action
enesis 4:6-7, where the Lord speaks to Cain after his offering was not accepted. The passage states, "If you do what is right, will you not be accepted? But if you do not do what is right, sin is crouching at your door; it desires to have you, but you must rule over it
Note how he said he must rule over it, how do you explain this away from Cain having free will to do what is right or wrong? True it is not free will with salvation itself but the mere fact that there seems to be free will in this case says something to me.
Not to mention lot and his wife God commanded that they not look back at the city of sin but his wife did and became a pillar of salt, how in this case was she a slave to sin? she was given a chpoice and paid for that choice