By trying to read some documentation like a book from cover to cover will be waste of time.
There is no "only SO and LLM shortest path" vs "always read full documentation" - there are always more sources like blog posts, walk troughs that will be much better investment of time.
Sometimes you need someone to explain architecture of the tool much differently than it is described in documentation when documentation is dry. Sometimes you need better examples better aligned to what you are trying to do. You need different approaches to grasp the thing.