When others disagree with us, we often have reason to update our beliefs in their direction. We should defer to our epistemic peers (and superiors). And yet we often fail to do so to the extent that we should. We suffer from egocentric discounting: we put too much emphasis on our own inside views relative to the views of others. This has been much discussed.
Seems like underengagement could explain underdeferment trough some kind of inner availiability mechanism.