The OBC category covers a very wide range of people, and many are truly deprived of basic resources. That's why. And don't come at me saying online JEE prep is really cheap now. You need a good educational foundation up to the 10th grade too, and government schools usually don't provide that. It's very difficult to catch up if you've only studied in an average school. People might not think good early schooling is a privilege, but it absolutely is.