When we consider things at the macro scale, we may find properties that don't appear at the micro scale, this is called emergence, and that's what thermodynamic

When we consider things at the macro scale, we may find properties that don't appear at the micro scale, this is called emergence, and that's what thermodynamics is about. Particle motion may be deterministic, and importantly, time-reversible, when we have too many particle to individually consider, the rules change, and that's when you are talking about entropy and temperature. To consider an extreme example, our brain is made of subatomic particles, and yet, psychology is not at all like particle physics. The same can be said of finance, where global economics have laws that don't apply to individual transactions and vice-versa. It is like shuffling a deck of card is considered random, though it is not at all the case, in fact, a skilled magician can control the shuffle and pretty much order the deck in any way he likes. But for the purpose of playing cards, it is considered random, and theory is built on that.