Many parents, relatives, and elders in Chinese families tend to bully the weak; when others dare not bully, they bully their own children. Some children grow up, and their parents and relatives no longer bully them. It's not that they don't bully anymore, but that they know they can't bully them anymore.

For example, when a child is still less than 1.5 meters tall, they are bullied by parents and elders. Imagine this child growing to 1.8 meters, strong and formidable, and suddenly the parents and elders speak more politely.
One is physical strength, and the other is mental resilience; if not mentally strong, one can still be bullied. They are all driven by animal instincts.