Is the sighing and groaning that gets the mark the same as the complaining on JWN?
No, I don't think so.
JWN is more like
21 He drank of the wine and became drunk, and uncovered himself inside his tent. 22 Ham, the father of Canaan, saw the nakedness of his father, and told his two brothers outside. Genesis 9:21,22
verse 23 better describes "sighing and groaning over all the detestable things" because Shem and Japheth were concerned with their father's righteousness
23 But Shem and Japheth took a garment and laid it upon both their shoulders and walked backward and covered the nakedness of their father; and their faces were turned away, so that they did not see their father’s nakedness.
No, I'm actually not saying the sins of the Watchtower should be ignored. Love is a powerful force. The sins might have been covered with LOVE but they were publicly exposed. We do not know what would have happened. It's gone.