First of all, I can tell you clearly that the resistance of bacteria to antibiotics is harmful to everyone. Since you want to be easy to understand, I'll always tell you by analogy. For example, wolves (bacteria) eat people in a place, which leads to regional (people) instability. But usually we just see the corpse (symptoms of infection), but we don't see the process of wolves eating people. So generally speaking, we don't know whether the crime is committed by wolves, tigers or lions (different kinds of bacteria). So the most common consequence is that we throw poisonous meat bait (broad-spectrum antibiotics) everywhere in the wild. This caused the death of most carnivores (all kinds of bacteria, including some common normal flora in human body or sensitive bacteria in pathogenic infection bacteria) nearby. At this time, some remaining intelligent carnivores (drug-resistant bacteria) or herbivores (some opportunistic pathogens of human body) lack natural enemies and similar competition, and will come out to make waves (stubborn infection caused by drug-resistant bacteria or opportunistic infection of normal flora), causing further and more serious damage to our environment (human body). These surviving animals with strong adaptability to the environment can also infect other towns (other patients) through migration (cross-infection in hospitals, bacterial drug-resistant plasmid transfer). Therefore, this mindless antibacterial method is harmful not only to individuals, but also to the whole society. I don't know if I explain this, do you understand?