Here recently I have came to the conclusion that certain people cease to have ears. They can be told something more than once and still do something completely opposite or not do it at all. When you get out into the real world, listening is key. Now the trick question is whether or not these earless people will learn to do what they say.
In the real world one must listen, for if they do not, danger becomes or may become a possibility. A high school cooking class for example; you listen to the teacher or else you could risk not only your life, but every persons life inside of the building. It could also be a matter of food safety. You must cook food according to directions or else you could cause a food-borne illness. (Because there are really those people out there with no common sense).
Where I work, I have to ensure I clean certain materials and work stations properly for safety and health purposes. If I don't, one could become sick or hurt. It's not just the rules to do a job properly, it is common sense.
Listening is the key to life. The more we listen, the more we learn. The more we learn, the better off this world will be. People should learn to listen more. Important morals are picked up that you will learn to use sometime in your life. And even when you don't feel like listening, please do, because it will make a bigger difference than you expect.