To be fair, we don't really know what works in terms of governance and what doesn't.

We do know what science currently says, but that doesn't mean it will forever indicate the same conclusion (to wit: nutrition). It does not provide much insight into a complex world like politics and civics, which are better thought of as an open system with unclear interactions between inputs.

(Also: "science" is not some unified view that has the on-high pope with decrees.)