When you have a coping mechanism you can walk through bad days like water off a duck's back, then you can take the good days and use them to climb and grow as if the bad days weren't even there.

You're implying the bad days mostly hurt people psychologically or behaviorally, because they don't cope well. And not via impersonal mechanisms like disease, injury, loss of money or property or family or community. I don't think that's well supported.