Too many choices
Some people have known since childhood what they want to study in college. Others experience a "eureka" moment sparking their life's work. Most students, however, enter college undecided on their objectives, hoping that something will click when taking an elective course.
Part of college preparation is to discover individual strengths and interests, and how to develop them during and after college. More critical than getting into college is how a student gets out of college. A major difficulty before college is gaining exposure to what the world has to offer, particularly in interdisciplinary fields. For many students, finding an academic direction before college can focus efforts to do well in high school and identify related extracurricular opportunities.