I think hobbies can bring sanity to your life.
They take your mind away from your problems. They give you a space for yourself away from work and family.
They give you a sense of progress because you become better on doing them.
Hobbies can bring your spirit out of sadness and loneliness. They can help you build a community and make friends.
Hobbies, I think, are as important as one’s job.
Here is the result of 2 years of my primary hobby in Japan: Pottery.