I think the aims are to get the best information for the least effort. But this can easily lead to under-testing if the underlying assumptions are wrong.
However, due to the poor methodological quality and reporting of the studies, the likely presence of publication bias and the questionable relevance of some interventions to current day practice, we are unable to draw strong conclusions or recommend the implementation of specific intervention types.
This is a major indictment of the medical establishment and the available research. Is it any wonder that patients (well, many of those here) have lost patience and have no faith in the system?
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