It's worse. Atris fell to the dark side at some point without admitting it to herself. So the Jedi are more or less following the code of a traitor.
And none of the exile's students thought that might be worth considering while they were busy rebuilding the order. No future Jedi did either apparently.
I guess it's good to have someone to blame for the PT Jedi.
It's also stupid because of how utterly contrived it is.