What's the point of going to college away from home when you have an option close to home?

My state university has multiple campuses. One campus is 15 minutes away from my house. And yet, my peers are going to attend the campus that's 2 hours away and stay in the dorms. Why do many people do this? Both campuses are about the same size and have the same majors. Why spend extra money on the dorms when you can attend close to home?
What's the point of going to college away from home when you have an option close to home?
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