I realize this question is contrived, but I figure it might provoke some fun discussion, so here goes:
If you could push a button and have your brain modified to precisely remove a cognitive bias (and have no other unnecessary effects—most convenient possible world), which would you choose? Why?
What if you were choosing for the whole human race?
I think the point is weaker: long established traditions do not contain self-destructive advice and contain good advice for the times in which they were created. If the circumstances have changed sufficiently, the advice of ancient traditions could, in fact, be bad.