That they let us feel being adult is one of the best stages in life. That you will be living in a happy life having a good salary. Pursuing your career and find a man that will help you build together your dreams. That being on that stage will be a stage of success and earning opportunities will arise.
They did not mentioned that the level of maturity and the sense of responsibility arises and it will totally screw you up. They haven't mentioned the pressure of friends, family, and even at work which are depressing.
They didn't tell that you'll be building your dreams. That it is not easy as one two three.