Humans are addicted to depression. I feel we like to feel bad.
Don't people avoid addressing issues that make them uncomfortable?
Then why do we let our thoughts go back again and again to the things that upset us, or make us unhappy? Shouldn't our in-built escapist attitudes help us run away from those very thoughts? We do try, but it requires a conscious effort. The way we're wired, I'd have thought it was simpler than that.