I realize the terminology may be dense it's the only way to get this much information in so little space. Unfortunately, many of the items listed herein are not in any clinical trial or are not covered by many medical plans.
Access is therefore a problem.
Assessing therapies tells us if what people are doing is helping or not or hurting. And if helping, to get an idea on the strengths, limitations, problems, dosing, scheduling and other types of questions that help achieve the maximum benefit. The first issue is what to study. There are many anecdotal reports, scientific evidence and other rationales for reviewing a variety of alternatives. There are many others.