You are equating the stability and order of physics and energy with the stability and order of society. I would suggest this is erroneous.

Heroes are concerned with keeping society stable and ordered, because that is is how peace is maintained and how we can attempt to make things fair. In an ordered, stable society the wicked are punished and the virtuous have a chance to get ahead by building legitimate businesses, raising families, etc.

Reducing everything to its lowest energy state might allow the universe to reach a point of physical stability and relative order, but it would by definition spell the destruction of every society and all living beings. Or at least most living beings, when you allow energy constructs in a fantasy world.

Order of physical energy =/= order of law and society.