I don't really like going to school much either. So I can get a job later. This is an important point. Owen could leave school if he wanted to, but he realises that in the long run he is better off getting an education. In other words, he has decided that if he takes a long term view, he will probably be happier if he stays at school now.
Some people have trouble taking a long term view of their own happiness.
They don't seem to be able to get their thoughts off the present. You're thinking of people who have difficulty thinking backwards from the present. I'm talking about people who have trouble thinking forwards. Yes that's closer, although it doesn't relate specifically to failing to take a long term view of your own happiness. I'm thinking of addicts.