I'm a MH professional with years of experience and am trained in CBT/DBT as well as counselling for e.g abuse, bereavement.
I get great results and amazing feedback from service users. Yes, I'm knowledgeable and skilled but I am under no illusion that my great results are often due to the fact that when people come to see me....
They get my undivided attention. I listen. I understand. I care. Coming to see me gives them something to get up and out of the house for, something to engage with. Support. Encouragement. Someone saying 'well done' or ' don't be too hard on yourself' or even just someone to acknowledge that that person has been through a shit time and it's ok to be struggling.
And I'm not just talking about MH problems that a lot of society think may be exaggerated or indulged (like anxiety or depression) but the whole premise of early intervention in people with psychosis isn't just based on medication or supervision - it's based on the relationship between the service user and the worker (I worked in one of the pilot schemes that improved outcomes so much, it was seen as a priority MH service and rolled out nationwide).
So it's not about whether alternative therapies work in themselves (they don't IMO), it's that for the service user - engaging in something they think might help often does. Because the placebo effect is powerful. But the positive outcomes aren't usually attributable to placebo effect - they're a consequence of the interaction between the service user and the 'therapist'.
And if it leads to positive outcomes - as it often does, it saves the NHS money in reduced visits to NHS services, reduced reliance on medications etc.