There is no amount of static material that will perfectly conform to the shape and contours of every mind that consumes that static material such that they can learn what they want to learn when they want to learn it.

Having a thing that is interactive and which can answer questions is a very useful thing. A slide deck that sits around for the next person is probably not that great, I agree. But if you desperately want a slide deck, then an agent like Claude which can create it on demand is pretty good. If you want summaries of changes over time, or to know "what's the overall approach at a jargon-filled but still overview level explanation of how feature/behavior X is implemented?", an agent can generate a mediocre (but probably serviceable) answer to any of those by reading the repo. That's an amazing swiss-army knife to have in your pocket.

I really used to be a hater, and I really did not trust it, but just using the thing has left me unable to deny its utility.