?????
That post answers its own question. Do you think grace is irrelevant or not applicable prior to conversion? The limits (or empowering) of grace exist at all times, on both sides of conversion, not just after conversion. God simply acts differently with the unregenerate than He does with the unregenerate and His choices have nothing to do with the will or act of the human. Similarly, the unregenerate and the unregenerate think, will, and act differently than the regenerate. The former has no Spirit and no salvific relationship with the Sender of that Spirit. That unregenerate person has only their sin-compromised and corrupted flesh and whatever grace God bestowed on that person prior to either his conversion or his destruction.
I don't Rev's post to imply grace is solely a post-conversion condition. More germanely though, you are correct that Paul is writing about himself from the already-regenerate position, but he's writing a comparative narrative that goes back and forth recounting the Law-only and With-Spirit conditions. It might help to remember the Law was a covenant, so both conditions from which Paul is writing are covenant conditions. He didn't specific a non-covenant context or condition at all in Romans 7. Grace applied to both covenant conditions, it just applied differently.
Part of the "Our will is bound from the things of God before grace," simply has to do with the design specifications of creation, the world, and what it means to be human. Humans are not volitionally free to ignore gravity. I don't care how strong a person's will may be, that person cannot will themselves to survive the effects of the sudden stop at the end of a 1000-foot fall. Time and space provide a variety of limits on the human will and each of them are specifically a consequence of God's design. Add to those limits the effects of sin and even more limits are added.
When some people say, "free will" they mean one thing and when other use the exact same phrase they mean another. Pelagius and Augustine, Erasmus and Luther, each saw the matter of volitional agency in different ways that possessed some common ground but also incompatible, necessarily mutually exclusive ground. One of the great ironies in the Cal v Arm debate is the fact Arminius sided with Augustine, Luther, and Calvin when it came to the effects of sin on the "free" will. Arminius plainly stated we cannot do anything good in the sinful and unregenerate state. We are not free in that way. I will gladly provide evidence from Arminius to that effect if desired and requested. Arminius held to a pre-conversion grace, just as monergists, or Calvinists do. Grace both empowers and limits the human will and it does so in different ways prior to conversion than it does after conversion. It is by grace we are saved!
And no human, regenerate or otherwise, draws a single breath one second longer than God in His grace permits. When God in His grace decides a person has drawn their last breath that is exactly what happens.
