Recommended properties for Class: DataService endpointDescription / hydra:Operation

[nmtoken]

According to DCAT3 the dcat:endpointDescription property has a a range of rdfs:Resource .

The usage note says that:

An endpoint description may be expressed in a machine-readable form, such as an OpenAPI (Swagger) description [OpenAPI], an OGC GetCapabilities response [WFS], [ISO-19142], [WMS], [ISO-19128], a SPARQL Service Description [SPARQL11-SERVICE-DESCRIPTION], an [OpenSearch] or [WSDL20] document, a Hydra API description [HYDRA], else in text or some other informal mode if a formal representation is not possible.

In 4.9.2 Recommended properties of EPOS-DCAT-AP it says that endpointDescription range extended to hydra:Operation;

The note from DCAT seems to include all of HYDRA

What is the benefit of making this explicit extension?