I keep wondering as I read more and experience more things if the cause of some depression is as simple as nothing to look forward to. Joining a club, taking up

I keep wondering as I read more and experience more things if the cause of some depression is as simple as nothing to look forward to. Joining a club, taking up a hobby, visiting a church, learning a new skill, etc. all seem to help people with their condition. We're wired to connect and to hope and dream. For some people exercise does that but it just makes me tired and want to crash (even when I was in shape and playing football in school). It is a difficult issue and I worry with our technology induced isolation that it will worsen.