Why do people act like it's so great to be alive?

I agree that telling a depressed person to just snap out of it and see the beauty of it life is terribly ineffective. I think a lot of support for depressed people though isn't so much about telling them how good life is, but just that it *can* be good if they work with the right resources. I have a few mental illnesses including depression so I know how hard it is to get out of feeling like there's nothing to live for, but it's important to try, even if it takes a long time. It's worth the chance of enjoying life again.