Often, we don't want to learn more about the misfortunes of our world. We would like to continue to hold the same innocent understanding we did as children; trusting that the world is a generally good place. When we know the messy realities of problems in our world, we feel responsible to change them. If we do not try to change them in some way, we feel guilty and selfish; unwelcome feelings.
Yet, ignorance is not bliss, it is cowardice...or apathy.