Is the purpose of the 0th, 1st & 2nd Laws of Thermo to legitimate properties?

[swampwiz]

Is the purpose of the 0th, 1st & 2nd Laws of Thermodynamics simply to legitimate the thermodynamic properties of Temperature, Internal Energy & Entropy, respectively?

It seems that all these laws really do is establish that these properties are valid thermodynamic state properties and the underlying transitivity (0th), formula (1st) & constraint (2nd) that are fundamental axioms from which the science of thermodynamics can be constructed.

 

[Chestermiller]

Do you think they might be of any use in quantifying design and operation of mechanical and chemical processing equipment?