There's the aspect of rearranging knowledge but also the distress that lies in dealing with difficult aspects of reality. Right now many people deny human caused climate change because if they didn't they'd see themselves confronted with a bunch of uncomfortable changes and difficult problems.

It's not just "oh, this thing I believed to be true is actually untrue" but also "ahhh now I have to deal with a bunch of overwhelming issues and the stress that comes with that"

That's a big part of my theory as well. Until the social or economic consequences of the tribe rise above the concern for energy demand, neurons aren't going rearrange or build, because that takes too much energy.