Answer:
Studying is a human need. We humans need knowledge to nourish our minds and souls. At school and university we learn much more than the curricular subjects, we also learn about life, about relationships, about self-knowledge.
In high school, we build the strongest relationships, make friends who will often be with us for a lifetime. It is at the time of transition from teenager to adult, when we experience the greatest joys, the intense discoveries, we experience the first times, we experience the first loves. Studying in high school is synonymous with having rules to follow, but also having kind teachers who also teach us about life and advise us in this coming of age.
In college, the responsibilities have arrived, it's time to think about the future in a practical way. There's not so much time to share with friends anymore, in fact, there's often no time to even make real friends, many students are split between work and classes, and when they arrive in the classroom, all of their attention is focused on learning. There aren't so many rules either, you don't need to ask for permission to enter or leave, there is almost total freedom, and if you are there, it's a commitment whose only interest is you.
But in college there is also joy, there is energy, lots of parties, a lot of diversity of culture and people. You learn to open your mind, to think in a different light, to enjoy research, to have your favorite authors.
Each moment of life is unique, each phase is interesting and there is no better or worse, but in all of them there are important moments and the lessons that will be eternal.