I picked one example, but there are others that well predate the term "Evidence Based Medicine". Semmelweis comes to mind. But I've also seen Koch's Postulates used in evaluating the practice of medicine, in addition to the study of disease.

You could ask for clarification before simply assuming I don't know what I'm talking about.

Furthermore, I'd suggest that understanding disease and understanding the practice of medicine are far more entangled than your division suggests.