The abstract says "SHACL is a language for validating RDF graphs against a set of conditions"
This is indeed an important use case and one that boosted this standard. But it is called SHACL and not RVL (RDF Validation Language), because its purpose is more general. The SHACL standard should stimulate re-use (including innovative re-purposing) of SHACL and not reinforce a single use-case narrative.

Suggestion: "SHACL is a language for expressing constraints and rules on RDF graphs"