I guess that's technically true, but RAG has colloquially taken on the meaning of vector database retrieval. Perhaps there's a paper out there that defines RAG specifically as any data retrieval, but at this point in time that's so general a term that it's bordering on useless. It's like saying "network connected application". No one has said that for decades now that it's status quo. Also, there are many types of networks, but "network connected app" generally meant TCP, despite it not being in the name.