I would say they have other usually means to discover if the data you present through JSON-LD is suitable to their search engine (like checking your webpage is actually discussing what it claims to mention). Google can show rich effects or snippets when you insert structured knowledge to your site. https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html