[nequo]

> that one guy in my econ class who always ranted that if it wasn't backed by a RCT, all theories are BS.

The converse may be true though. If it is not backed by a theory, an RCT is BS.

[eutectic]

There are many effective medicines for which the mechanism is unclear or disputed. Should we stop using them?

[operator-name]

You can use things for which there is weak or conflicting evidence for, just as you can take a sauna just becuase it makes you feel good. But take them as what they are and accept that doing so does not follow a strict interpretation of the scientific method.