What paul is saying is when a person dies, they sin now more. They can’t sell crack or make porn movies or whatever because they are dead. That is kind of the whole idea of being free from sin, the new person in christ, the death of the old man.
The NWT changes set free from sin to aquitted from sin which changes the context of the verse. It is just just watchtower dishonestly and also leads to suicides.
This subject is one of major grievances with the borg and which i saw the changes and more importantly context , i was just pissed. Still am.