...especially in a soft-science topic like health which suffers from a lack of rigorous scientific research...
The first thing that came to my mind when I read this sentence was the amazing science done by Louis Pasteur. There was nothing "soft" about his science, and countless millions of people are alive today only because of his tremendous scientific contributions. Your faulty characterization of medical science reveals a deep lack of understanding not only of medicine but of science in general.
One should not confuse "health" with "medicine"...
Medicine is all about health. There are plenty of healthy people who know nothing of science or medicine, but that hardly means they are experts on the subject, or that a site such as health should allow any person who may have some health to express their erroneous opinions.
...where you sometimes have not well motivated research being done done and bad conclusions drawn as a result.
What has this to do with our site? Every field has suffered from badly designed studies and/or misinterpretation of results.
Similarly, your decision not to take the medical literature seriously is not an adequate reason to allow you or others to post answers without citations. Probably the great majority of people who write answers consider them well written, even if they are completely wrong. That's because of a failure to distinguish beliefs from facts. No one is immune to this common error.
That is why beliefs are not enough on Health.SE.