usr does mean user. It was the place for user managed stuff originally. The home directory used to be a sub directory of the usr directory.
The meaning and purpose of unix directories has very organically evolved. Heck, it’s still evolving. For example, the new .config directory in the home directory.
Yeah gotta be honest this is just what (competent) lawyers do. A major part of law school is teaching students to consume large amounts of legal documents.