The martial arts metaphor for rationality training seems popular at this website, and most discussions here about how to believe the truth seem to assume an environmental worst case: how to figure out everything for yourself given fixed info ...

A very good point!

But I can't easily explain why it is a good point without violating the ban on mention of AI.

This observation doesn't invalidate Less Wrong. Someone still has to study these things. But the emphasis on individualism here can diminish awareness of the big picture.