I think you're approaching it form very high level, when you should think about it from much lower level, i.e. success is being determined by stress/dopamine hormones or similar
It is important that “profit”, comes in various forms, which exchange rates are problematic to calculate (or maybe there can’t be any): not hungry, not thirsty, tastes good, not cold, feel safe, feel excited, feel righteous, feel powerful, listen to music, watch a movie, get curious, satisfy curiosity, laugh, love, sex, rock n roll.