Think about it this way: say you're a Christian. Aren't you glad, as a Christian, that we don't practice that religion the same way they did 1000 years ago? Questioning of some of the church's practices, re-evaluating some of their methods, etc, helped that religion GROW into what it is today. We don't stone someone to death for working on the sabbath anymore, because people started saying "hey, that part kinda sucks".
Shouldn't we do the same with AA? If we're not allowed to question or criticize it on a recovery board, how will AA ever get any better? How can people get their questions in front of a relevant audience? It just makes sense to be able to criticize AA on a recovery board - in the end, discussions like that are the only thing that'll help AA become more effective!