We are bound by the limits of our fallen nature, which makes us “dead in our trespasses and sin”.
We are not sick, but dead.
Free will, therefore, is a myth apart from God’s grace giving us the option to choose life.
A dead man has no choice otherwise.
There is no human autonomy to choose anything apart from what God has chosen to delegate and enable.
He allowed Adam to choose sin. He now, through the Cross, enables us to choose life.
That’s what makes grace so amazing.