You're missing the larger point, the presentation of the choice implies that they had the real ability to choose. Nothing in the new covenant implies we lost capacities and if what you are saying is the case then it is not Adam who is responsible for the loss of the imago dei that is required for us to lose the ability to choose, but Christ. Now, in a sense I did not choose Christ because I didn't choose to have the gospel preached to me. But that doesn't negate that I had the ability to respond to the gospel.