You know what it sure sounds like Paul is saying they are doing something wrong. Which would be completely absurd and useless, A LIE even. Since there is no act on their part to correct the situation.
In other words looking at the law can't damn them since you already believe doing things right is of no benefit why whine about doing things wrong?
Who's he talking to at all?
Imagine we are in same room. Well Gee Paul we here are already under grace, what are you going about like a madman for?
Galatians 5
19Now the deeds of the flesh are evident, which are: immorality, impurity, sensuality,
20idolatry, sorcery, enmities, strife, jealousy, outbursts of anger, disputes, dissensions, factions,
21envying, drunkenness, carousing, and things like these, of which
I forewarn you, just as
I have forewarned you, that those who practice such things will not inherit the kingdom of God.
Who is Paul warning? Not us we are saved already. Not the unsaved there is nothing in their power to better their situation.
He's here saying I'm warning you just as I have warned you before. From what? I'm saved. I have a right not to behave. How dare he try to make me ashamed as if he is qualified more saintly then I am. God alone is the qualifier. I AM SAVED through Jesus Christ.
I don't have to stop sinning, It does nothing for me. It would be an audacity on my part to even TRY to stop sinning.