I mean this with no hostile intend, but have you honestly stopped and thought about what you did type down here?
What I mean by that is, have you looked at the complete picture to see if what you are saying makes sense in relation to what you initially said.
You questioned the need for documentation. Now you are saying there needs to be good documentation for LLMs to train on. Good documentation for LLMs to train on is actually much more extensive than than the documentation written for humans to begin with. So, you are effectively saying there needs to be more documentation.
Secondly, how can developers ask about something when they don't have decent documentation to start with.