The patients with unmet need for emotional support, that they don't get from the mainstream system, may end up looking for it elsewhere and risk end up being exploited by quacks.
Much of the pseudoscience being produced in this area seems to be the result of attempting to give credibility to a treatment by showing that it treats the disease. I suspect the value of the treatment is mostly limited to emotional support.
People have difficulty accepting their own fragility and their need to be listend to with their problem, in an intimate setting by a caring person. For those who have not experienced it, it is difficult to comprehend just how much a serious health problem can upend one's life and erase a person's confidence, identity, hopes, life plans, etc. Perhaps this is why people fear judgement for seeking emotional support.
Surely we can do better than all this?
Maybe a model that would work is a "regulated free market" approach. Once an unmet need for emotional support has been identified, the patient is provided a list of activities offered and they can choose to participate in one session a week. When given a choice, patients will naturally gravitate towards those activities they find effective. Some rules need to be in place to ensure the programs don't do things that are problematic (like making claims about recovery, patients being indoctrinated to believe things that are problematic, etc.)