@danluu I think the secret answer is "because metrics are applied semiotics, and the semiotic locus of the MBA-as-religion demand that expressions of value are undifferentiable and measured in dollars, a lens through which all other nouns must be incuriously seen, as a matter of doctrine, lest the entire edifice collapse" but it doesn't exactly roll off the tongue and managing people well is hard so we don't talk about it like that much.