Yes.
The priest is a shaman. Most shamans insist that it is very important to believe in the belief system that gives the shaman a special status.
It is also important that the shaman is the person who should interprit the belief system. Not many religions encourage individuals to interprit the scripture by themselves without serious guildance -- those that do tend to end up becoming quite fragmentary, and tend to disappear in a whirl of chaos after a short lifespan.
Religions that persist tend to have shamans that provide pre-packaged dogma, encourage parents to train their children to follow the dogma, and consider non-believers to be "less" than believers.
Religions who don't have that structure "drift" a huge amount. They lack the self-replication advantages of strong-shaman belief systems.
That a logical enough reason for you?
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Last edited by JHVH : 10-29-4004 BC at 09:00 PM. Reason: Time for a rest.
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