Biggest problem with teenagers(I had my own when I was in my teens). They think their eagerness, fresh introduction to the world, and their raw energy as something that is going to stay forever.

Note, as a teenager you have least responsibilities. Hardly anything to lose when you fail, full of energy. And the only way you can go is up. And this is as easy as it gets, once you step into your 20's at every step there has to be a compromise, if you don't you will eventually anyway.

Though I wish this kid succeeds. But in general it takes two big failures, where things went wrong from reasons outside of your control to get a grip of the actual reality of life.

Basic things in life like hard work never change. But its important to realize merely just raw hard work is never enough. And there are people in this world who fail, despite working as hard as any one else. It takes experience to understand that.