Cognitive Biases.
We don’t even hear or see information that disagrees with our beliefs half the time. That would fall under Confirmation Bias.
Cognitive Dissonance. People generally try to reduce psychological stress, so their minds are working hard to make new information fit into their existing world concept.
If new information is confusing to them or above their heads, they just dismiss it altogether.
There are many cognitive biases that influence how we listen to other points-of-view. Another is Halo Effect. If we have a good first impression of someone we might trust their opinion about many different things, even something they really have very little expertise in. It could be a positive first impression based on how they look, or could be they were very knowledgeable in one area. It can be just the relationship too, like valuing the opinion of a religious leader or political leader to the point of not questioning at all.
Some people are more comfortable keeping an open mind and changing their minds. Scientists are trained to do it.