Struggling to change is different from not wanting to change. People seem to have trouble with basic distinctions like this when they're heavy into moralizing failure to change.
She wanted to change, tried a many multiple of times and it failed. Fault, guilt, blame are useless concepts to use on the Other. And only in moderation should they be applied to the Self. There deep disconnects between what we think, know and do.
Bob the gambler wants to quit and wants to wager, sometimes sequentially and sometimes simultaneously.
The question isn't whether the whole Bob "means it", but which version of Bob we want to ally-with to war against the other, and what conditions or limitations we put on that assistance.