In general I agree that yes, the answer is "more science", although my intuition tells me that some domains are too complex to ever be modeled accurately by hum

In general I agree that yes, the answer is "more science", although my intuition tells me that some domains are too complex to ever be modeled accurately by humans...meaning writing and managing the codebase to accurately model some domains, even with infinite computing power, would be impossible due to humans limited mental capacities. What those domains are, however, I don't know and don't want to guess. I just suspect they exist. In regards to your point about policy, if it is implicit (as in findings reported by the media), that's fine. However, as soon as policy is made explicit, either through law, or through national policies such as the food nutrition pyramid, interest groups immediately begin forming to protect said explicit policy. The rules our policymakers have to follow were explicitly designed in a way that makes changing policy a slow, arduous process to protect swift changes that could have dangerous, unknown side effects that every citizen would have to deal with. When we prematurely start explicitly making policies based on empirical results in domains of chaotic systems (i.e., those domains where unknown, new variables appear often and change the course of things), those policies have a higher chance of being wrong, and it becomes (by design) very hard to change those policies later on. This is where my concern is rooted.