I would have thought a non-profit board that puts the growth and success of their organization above the mission in their charter, even if they view the organization as going against their mission, sounds like the worst kind of board. How could that possibly be a good idea?
Isn't the whole reason we have non-profit boards and charters is so that they can make just this kind of call?
(I'm not saying that this is what is happening here -- just responding to your particular claim.)