Question

Why do we need hobbies?

Answer 1

FOR ENTERTAINMENT IN LEISURE TYM

Answer 2

We need hobbies to relax us when in sorrow, or in depression. We need hobbies to synthesise ourselves, or to revive ourselves.
We need any hobby to keep us active throughout the present day, i.e., in a whole, we need hobbies to keep us active throughout our lives. 
We need hobbies to maintain ourselves; and, to lead a peaceful, and prosperous life.

Thank you.
Hope this will help you. :)