I firmly believe that gaming or any other hobby and/interest can heal you from depression. When feeling depressed, I game to come with it. And you personally? What do you think of it in your book?
The Witcher 3 was the best escape for me. I spent hundreds of hours slowly exploring the world and all of the side quests, as slow as I could, honestly. It saved me so many times.
I think games can make people feel happier when they are feeling sad because games can be a fun escape from sad thoughts and situations like getting unfairly treated by other people.
It just depends on your own personal hobby. There is gaming, sports (any form of exercise), travel, hanging out with friends and family, reading, listening to music, etc.