I don't think so. I think it's the core vulnerability. If the knowledge of the truth is shared, it is a strength that makes the group stronger. A group delusion makes an unstable society that can be exploited by people who understand this. I think that the genetic/epigenetic basis of this capacity to ignore reality eventually must lead to a crisis that involves a massive amount of deaths from the inevitable consequences of such errors being ignored and the problems of them accumulating over time. I know I'm not in that group, I am repulsed by this behavior and as much as I am not a fan of people dying I am also tired as fuck of living in a world full of people who are capable of being deluded into believing a cold virus is lethal to anyone with adequate to moderately poor health. This is a society that will run on command over the edge of a cliff, and I'm not gonna stand in their path, tyvm.