Alas, you'd still need the knowledge graphs. I hope the licensing issues for at least some of the KGs will be resolved soon. It's a tricky issue. Even some of the ontologies and controlled vocabularies in biomedicine can't be released publicly due to copyright restrictions (for example, full SemMedDB uses UMLS which uses SNOMED).

Makes me wonder if LLMs can be used to generate useful KGs (possibly from the right source material).