Coaching classes - very expensive. Review on How to Choose a Best Coaching Classes or Institute

I feel coaching should be self study. Now in this century we find very brilliant students who are very active, can cope up with the world and are very confident. Why do they need coaching classes? They have all the ready made stuff in front of them. The internet gives them everything vide laptops, mobiles etc. Through facebook and watsapp they are discovering and learning things. In fact good schools teaches them that they need not go for any coaching classes and that they themselves should show the interest in sitting and reading books, working out, go in for group discussions, take the help of school teachers and collegues. When they do it themselves they will improve more. They try to know their drawbacks. Why should a teacher from a coaching class find out their fault. They can themselves find out what is lacking in them through hard work. In schools, they are already paying fees and spending some hours. After school they can have some break or free time and then switch on to their own study system. These coaching classes just take a lumpsome money and not all are successful. Then they again go for repeaters batch and waste one full year. Is this needed? It is better to have confidence in one's own efforts and forget these coaching classes.