Expository Writing - Do we still need heroes?

In my opinion, we no longer need heroes. And that is because having heroes will make us dependent on them and unable to be independent people. We might also learn the wrong values. And lastly, having heroes will affect our teamwork.
As I was writing this expository essay, I recalled a time when I was in Primary 2. I had a pile of test papers given to me during the exam period. However, I was not doing my work, but was playing my favourite game, Maplestory. My mum asked me,"Justin, why aren't you doing your homework? Do you not know that your mathematics exam is tomorrow? It is already night time! Are you mad?!" I replied,"Mum, I have common sense. You know, there is this thing called heroes? You know, Superman, Batman? During the exam, I think they will possess me and help me do all the questions. Don't worry, mum. I will make sure I get full marks." I am sure this has happened to many other young children before. If there really are heroes, everyone will just dump their work aside, because they know that there will be this "hero" with supernatural powers who will go around doing their work for them. Then everyone would be relying on that "hero" to do their work for them, and not actually using their own ability and talents to their work. We would become irresponsible people who do not use our wits and efforts to overcome difficulties. Thus we should not need heroes anymore because we should be independent people who rely on our own efforts and abilities to do our work and overcome difficulties.
Another reason why we do not need heroes is because we might learn the wrong values from our so-called "heroes". Take defiant students for example. In school, we might be looking up to them as our heroes because they have the courage and bravery to go against teachers and ignore teachers. If we are immature, we might not be able to define what is right, and what is not. We might think that those defiant students are true heroes, and are cool. Therefore immature students would start acting like them, and think,"Since they are so brave, why can't I be as brave? I must prove that I am also capable of being rebellious!" Therefore we do not need heroes because we might not have the maturity to define which hero should we learn to be like.
Lastly, having heroes would affect the importance of teamwork. In a team, there are people with many abilities and talents. And heroes can be just a person with the talents and abilities of everyone. Let's say there is a fire, and it is destroying all the houses down the lane. There are intelligent people who can lead everyone, there are strong people, and there are brave people. The intelligent people can think of the nearest water source, the best way to save the people trapped in the fire. While the strong people can fetch water quickly, and the brave people can go into the burning houses to rescue people. If there is a hero, everyone will not care about communicating well with each other, but just depend on the hero to do everything for them. But if there is no hero, then everyone will have a greater urge to work together as a team to overcome the difficult situation. Therefore having heroes would affect our teamwork.
In conclusion, we no longer need heroes because they would cause us to be irresponsible people, they might bad influence for immature people, and they would affect our teamwork.