Epidemiology is precisely one of those cases were very often a randomized control trial isn't feasible (or even ethical to begin with). Your argument is self-de

Epidemiology is precisely one of those cases were very often a randomized control trial isn't feasible (or even ethical to begin with). Your argument is self-defeating. That's why countless time has been spent refining the techniques and methods used to make and understand those studies, and why the vast majority of experts balance different kind of studies while making decisions, not just RCTs.