I don't think it's that narrow. The article mentions the kinetic theory of gases, which explains the observed properties of gases in terms of statistics of the motions of the atoms or molecules that make up the gas. Chemistry also explains observed properties of chemical elements and compounds based on the properties of atoms and molecules. I think those are included in "microphysics" as the article is using the term.

The article does focus on particle physics, I think because that's the most fundamental level of physics we have--everything else is built on it.