The message was never do anything impulsive for a woman.
He ruined his elder law reputation for Kim when he felt guilty and bailed out of the Irene Landry scam. He joined law school because Kim admired Chuck in front of him. He only confessed when he learned Kim confessed out of guilt. And then he took the worst deal anyway, because by then it felt good to absolve his guilt in front of his supposed lover.
This is the bottom line of Jimmy’s character. And it’s the bottom line of a spiritual cuck. Every single thing I’ve heard defending the ending is an emotional appeal, and it’s the calling card of cucks.