It's given and that's that, sin notwithstanding.
So you are actually rejecting Scripture and saying that Paul was wrong, for in Galatians he lists sins that will keep us from inheriting the Kingdom of God.
One more time: How many of your sins were in the future at the Cross of Christ? How many of your sins were in the future that would take God by surprise when you first acknowledge Jesus is The Christ, your redeemer? When Jesus said it is finished, who are you to play the accuser and point to sin which you believe He did not remite? Whose righteousness is upon your spirit right now? If it is not ONLY the Righteousness of Christ then you are a lost sinner in need of a redeemer.
And people who live like that aren’t saved, so he’s correct.
For the saved, then they’re good to go even when they do slip up.