I don't think it is the holistic treatment itself (whichever one that may be) that will 'bridge the closed mind', but rather, your own personal experience of the treatment. I am a great believer in truth being relative to the individual. One holistic treatment may be the fundamental answer for someone's issue, but to another, it could be labelled as absolutely useless.
I think most holistic treatments, in one way or another, serve their purpose (and with a much more understanding and conscious approach than that of 'mainstream medicine'). It is about looking at the client and what they are dealing with from an inclusive perspective, rather than one that is exclusive. The bottom line is (in my personal opinion), empowerment for your own healing will ultimately come directly from within you. Holistic treatments are merely guidance tools/systems to remind you of your inner, natural healing ability.
Hope this helps, and all the best on your journey!