please clarify this statement wombat. I don't understand....
The Krork
are the ork's off switch.
To put another way Krork are the adult forms of orks, but with out Krork orks can't grow up.
Normally they grow up, calm down and well...don't stay as giant children for all time.
you confuse survival with existence , the emotions that form the chaos gods would have continued to feed them allowing them to exist regardless of the imperial truth but the narrative the belief that they were any thing other than concentrations of mindless emotional energy that allows them to actually do things with said energy would have been cut off by the imperial truth effectively lobotomizing the chaos gods
But that's still not how it works.
If they were defined by narrative then chaos wouldn't exist, instead they would be billions of split stories not Khorne, Nurgle, Tzeench or Slaanesh instead they'd be billions of individual, distinctive creatures because across a vast galaxy stories and narrative diverge so strongly. Instead Khorne, Nurgle and Tzeench as we know them have existed relatively unchanging for millions of years as again Be'lakor can attest.
Similarly, stories and belief are unneeded if its just narrative which is what they need then just living creates those narrative through anthropomorphisation, beliefs in systems as opposed to religions and more.
Because people have the belief that there is a reason for the disease. That it's punishment by god or a curse by some demon instead of just the result of tiny little bacteria and viruses and that all the pain and suffering is just a fact of life in an cold, sterile universe.
With the Imperial Truth Nurgle would still exist, but without stories giving him a narrative that he can slot himself into as the cause and propagator, he can't act because even with disease and plague still happening people wouldn't give him the narrative he needs to influence things. He'd just be mass of power with no mind or identity of it's own.
And if true, this still wouldn't work because it relies on people being rational.
Humans are not rational and generally speaking, we cannot be trained to be rational especially when faced with such an utterly bleak narrative.
I know very well what makes up my computer I still anthropomorphism the heck out of it when I'm annoyed with it, it makes me feel better.
Besides the narrative simply changes then, it becomes theses microscopic incredibly powerful bacteria in the fight against humanity it doesn't stop being a narrative cause all things are inherently narrative.
Even then I still disagree, Nurgle can act fine without needing the narrative of being the plague bringer, one of the key points of the chaos gods was that after they were born
they reached out to the materium.
Again they don't need our belief or narratives to do stuff never have never will.