A great deal of this is explained in KittenClaws' tagline: Normalcy Bias.
Normalcy Bias is an incredibly powerful force in human nature. And for many, the more intense and powerful the information being revealed is, the more powerful and intense the NB reaction is. When I think about people that I have known over the years, and myself, it seems that those of us that have been "red-pilled" in small doses over many, many years have an easier time accepting more doses (even powerful ones) as they come along.
Do you mind explaining exactly what it is in layman's terms please?
Bagster the layman.