Usually campuses are the only places rationally designed to be highly accessible to people. So they can be walked. You can go from place A to place B on foot, usually under shade, either from a canopy, tree sided paths, or human scale adequately proportioned buildings. They also tend to consider and include amenities like parks, snack and drink stands, on the way. And also several cool third places like libraries, auditoriums, study halls, athleticism stadiums and cafeterias. Places where you can exist and occupy without having to consume. Finally, they usually confine cars to parking lots and prohibit their traffic inside the campus, making it a quieter and clean air space.

My point is, college campuses are sometimes literally how humans are the happiest to live.

Add: also consider how sometimes luxury resorts resemble the layouts and characteristics of college campuses. Self contained spaces where you can go everywhere and engage in all activities without having to sit on a car.