There are over 2000 professions in the world. All of them have their own special features. So every person has to choose a profession that will be interesting, and help to get well-paid job.
In school children study many different subjects and point out most interesting of them for their further study. Then they usually enter the Institute or the University to get future profession and professional skills. Some of them go to work. And, of course, it is better in any way, when pupils think about it in school.
But it is not always possible in practice, because very often pupils don't think about their future. Also, their preferences change greatly during school life. So, all pupils and students must take into consideration all these facts.
Each man makes own choice or follows advice of parents, teachers or friends. But making right decision is very difficult. So everybody must think about their future because in my own opinion every man is the maker of his own fortune.