Steve2 - You do not have to become apostate in your thinking to leave; it is far easier simply to slide into an increased level of apathy - which is a bigger threat to the organization's viability than apostasy.
Apathy is certainly a more practical threat. Unfortunately, it is still a big departure from people actually "waking up". Many of the apathetic count would defend the organization in a heartbeat if we were to openly criticize it in some manner.
That said, the apathetic serve their purpose. They typically contribute very little, (in time or money), tend to be a distraction to the efforts being made by the organization, and alas, it does not take much for them to wake up, when the time is right.
d4g