Why does schema.org say in the example for sameAs? [closed]

Why does schema.org say <!-- Utilising Wikidata as a source of URIs for entities in a sameAs relationship --> in the example for sameAs microdata at https://schema.org/sameAs? Shouldn’t adding microdata with the sameAs attribute to your own website be more reliable than Wikidata?

Doesn’t Wikidata have “notability” issues especially when it comes to World Famous A-List Celebrities?