Why do colleges have admissions processes?

I'm trying to understand why colleges have all these processes for admissions. Why can't they just let in students on a first-come, first-served basis or something simple like that?

College admissions processes, though they may seem complicated, serve a crucial role in ensuring that the student body is a good fit for the institution. These processes allow colleges to evaluate student's academic achievements, extracurricular involvement, and potential to thrive at the institution.

Taking students on a first-come, first-served basis may lead to an overcrowded institution with students who may not be well-suited for the college's programs. This might not only disadvantage the student but also the college community, since the entire college experience includes participating in class discussions, contributing to extracurricular activities, and adding value to the broader campus community.

Moreover, colleges have a goal to create a diverse and vibrant campus community. They're interested in assembling a group of students from a variety of backgrounds, experiences, interests, and perspectives. These differences can greatly benefit the learning experience for all students, fostering growth and broadened world views.

Finally, selective colleges and universities are also interested in admitting students who are likely to succeed academically. A careful admissions review allows them to consider things like high school curriculum, GPA, and, for some schools, standardized test scores, to help predict that potential for success.

All these factors and more create an environment where students can grow and learn valuable skills for themselves and for society in the future. That’s why admission processes are necessary - they help ensure that both the student and the school will truly benefit from their four-year relationship.