Hi blanket. In my experience this is true. Long story as to why I'm here on SI, but has to do with my NPD mom and her A. She could never make herself happy. We as a family could never make her happy. However, she's full blown NPD so nothing about her will ever change. That said, your husband most likely isn't. Yes, he needs to get to the bottom of how to live a self fulfilled happier existence. Nothing you ever do or don't do can help him with that. That's something he needs to figure out on his own. For that very reason, if he had an A, not fixing himself and figuring out why he's not happy in life, IMHO leave him susceptible to another A. He'll always be looking to fill that void within himself with something.
Sending you strength blanket.