Why Does Dissonance Provoke Curiosity in Some But Rejection From Others?

It has been a while since posting anything in my Question Quest but this question has been developing over the past few days.

Whilst at ULearn there was lots of discussion about the ideas being presented in keynotes, workshops etc. but also about educational ideas that have been shared over the year.

The most interesting conversations for me were about when people disagreed with the ideas being presented. When these ideas caused dissonance in people’s minds there seemed to be 2 main reactions: curiosity to find out more OR outright rejection of either the idea and/or of the person presenting those ideas.

I wonder why there is such extreme reactions to when our minds encounter dissonance? Is this linked at all with Growth vs Fixed Mindsets?