Children are taught at a certain stage in their life that there are starving kids in Africa, and that they mustn't feel too much empathy for people who they don't know. If a kid gets depressed over conditions in foreign countries, or develops climate change anxiety, or refuses to eat meat, they aren't encouraged. They're either sent to a mental health professional to have their empathy recalibrated, or the adults just hope their empathy blunts over time on its own.