There's a difference between documentation and LLMs. An LLM can be your own personal tutor and answer questions related to your specific code in a way no documentation can. That is extremely helpful until you master the programming language enough.
Somewhere right now there's a complete greehorn vibecoder who's saying "hold my beer" ;)
While they proceed to learn everything they can about the code that the LLM generated for them.
For the next few years, and never come back to drink the rest of the beer :)