But we know that mortal souls don’t naturally go to the shadowlands. Kyrians ferry them there. As far as we know demons don’t need help returning to the twisting nether. Could be the shadowlands is actually blocking the natural path of dead mortal souls. Not saying that’s a bad thing. Could be the natural path for the dead is to return to feed the light or void who are trying to regain the strength that dispersed when the multiverse was created.