You are right but it is not because the weakness of AI, it is because all AI generation app are built by those coder only know .md files. They do not know what a consultant level slides looks like.
See this demo in the middle I show some top level strategy business slides (they are all generated by AI)
https://youtu.be/Sq3a5qxsLwM
If you want to get knowledge from KB within 10 seconds, then traditional RAG (embedding+vector based) is still the most efficient way -- maybe more in consumer facing search / chat area.
If you want to get most precise and useful information from KB in minutes, then Agentic RAG is the key.
I believe Multimodal KB+Agentic RAG is a suitable solution for personal KB. Imagine you have tons of office docs and want to dig some complex topics within it. You could try
https://github.com/JetXu-LLM/DocMason
Fully retrieve all diagram or charts info from ppt and excels, and then leverage Native AI agents(e.g. Codex) to conduct Agentic Rad