I don't disagree with all your points. That said, what we have built has proven useful for us as we have built pipelines for customers and think it might be useful for others.

Probably the main point I disagree with you is that RAG is just ETL. If that was the case, all of the AI apps people are building would be AMAZING because we solved the ETL problem years ago. Yet, app after app being released have issues like hallucinations and incorrect data. IMO the second you insert a non-deterministic entity in the middle of an ETL pipeline, it is no longer just ETL. To try to add value here, our focus has been on adding capabilities to the framework around data synchronization (which is actually more of a vector management problem), contextualization of data through metadata and retrieval (this part being were we have spent the least time to date, but are currently spending the most)