The mapping from DNA to health outcome is unbelievably chaotic/high-cardinality, then mixed in with various environmental/social/cultural factors that don’t sho

The mapping from DNA to health outcome is unbelievably chaotic/high-cardinality, then mixed in with various environmental/social/cultural factors that don’t show up in DNA at all. Drugs are in fact how we come to understand this chain of causality, piece by piece. So yeah, what you describe is obviously the dream (hand waving through some ethical considerations) but we just don’t know anywhere close to enough about the biology.