Cecilo said:
Why would they teach anyone how to use the voice if they weren't going to follow the way of the voice, they make it very clear Thu'um is only to be used for the worship of the gods, except in the case of the Dragonborn who is the exception to the rule by virtue of being a gift from Akatosh.
Heck they threaten to stop teaching YOU the dragonborn more about the Voice if you don't start using the voice in the way they approve of until Paarthurnax tells them to let you up to the mountain top.
Because while THEY believe the voice is only to be used in the worship of the gods, they understand that not everyone agrees, and they have a greater understanding of destiny.
No they don't, in fact, you can tell them you dont follow their beliefs and they go "well, we wish you would, but we understand your dragonborn and gotta do whatever Akatosh wanted you to do, so its ok". The only thing they say is that they dont want you to learn the dragonrend shout because they view it as evil, not to use your voice only in the worship of gods, and those are vastly different things.
.
.
.
Also, its believed that Tullius, Ulfric, and the Dragonborn are all avatars of Talos/Lorkhan, so there's some mythic destiny bs going on here.