> And people will say "that's invalid because sometimes you really do need to do something clever and the 'what' needs to be documented" or whatever.

Yep, that'll happen, and when it does, you document why you documented the 'what'! :P

This kind of lazy black-and-white thinking is what 'consistency is the hobgoblin of small minds' is talking about. The exception proves the rule (...most of the time...)