I smoked heavily in high school and college. I gave it up for almost 10 years, bought some last year and smoked it, but haven't gone back. In my experience it sometimes caused anxiety. I don't recall it helping. And when I smoked it last year it made problems seem too serious. It's like I would dwell on them when I was smoking.
But, if your wife is smoking to serve a purpose that she thinks she needs, there is potential for pretty strong dependency there. That doesn't seem like a good thing.