Those verses in 1John point out our inevitable tendency to sin. They show the remedy for when that happens in the case of a believer. Nowhere, do any of those verses even hint that such sin is not truly our fault. Now, I'm not saying that there is not something of a type of willful sin or sin against light or presumptuous sin, which certainly is even more serious - but whenever we sin, is it not due to some choice we make? Or, are you moving to an acceptance of what the Calvinists call total depravity (which, even if you were, would not change the truth of what I am saying).
So yes, that is the question:
In my view, the question is not is it free or determined. I concede it's free, but with something drastically wrong with it which left to itself seems very unlikely to ever repent or believe the gospel without at least as much help as Arminius thought, and probably in truth closer to how Edwards viewed it. If the will wasn't "free" at least in some real sense then we could not be blamed. So I concede that but believe that indeed, our free will, left to ourselves, is the very problem.