You are wrong, I beat depression. I don't just 'cope' with it, I actually don't feel depressed any more at all. And this is the rule rather than the exception, most people with depression recover just fine.
Do you have statistics on that? Anyway, "depression" is so vague/broad that it's like measuring whether most people with physical unfitness eventually recover just fine.
When I say 'depression' I mean one of the depressive disorders as per DSM criteria. Major depressive disorder is the only one that has > 50% relapse rate. Most depressed people do not have major depression.