The life is easy when you live just to fulfill your basic needs, however, you still need to learn to communicate, learn languages at least to express your ideas to other people just how he did. That's not crucial for living, but it's important for the progress of the humankind. And what the subjects we learn at universities are if not the different ways of expressing our ideas. Math, physics, engeneering - they are just different ways of passing the knowledge to others for the sake of progress and for the next generations to live better.