But that is the entire point of philosophy.. 
They believe one thing, you believe another. Either brings you a degree of certainty if you adhere to it.
I told you what I believe above: Skepticism. That requires no particular adherence, nor moves me closer to any degree of anything necessarily.
But this isn't about what I believe. It's about not being able to actually converse with the Qun. There is no dialogue or debate with someone who claims "Certainty". Might as well bang my head into a wall.
It's not a "philosophy". Philosophy is still summed up best by Socrates' famous words. "The unexamined life is not worth living". Qunari do not examine. They simply embrace. And enforce.
Philosophy breeds examination, debate, refinement. There is no refinement when you already grasp all of nature and every single little tiny detail contained within. You just say "No" to anyone you claim is outside "nature", and act like a jerk.