What does it look like where some intentional effort is made by society to help people like this get what they are using these models to get, but in a healthy way? That is: how does society reconfigure itself so that people do not end up so lonely and desperate that an AI model solves a emotional problem which is hopelessly unsolved otherwise?

It is not "they go to therapy" because that's cheating; that answers the question "what can they do?" not "what can society do?" (and i think it's a highly speculative answer anyway)