Yes, teenagers have time. You are right.

On another hand, I had been a teenager whose time could not be optimized fruitfully because of family's financial problems. I could not have tuition. I could not learn the piano, or take up swimming courses. I could not do a lot of things which needed money as part of it. All I could do was to read books from the library, and study, looked forward to complete tertiary diploma, and then work.