Of course it's not reasonable, do you really think anyone thinks that?
This is like saying that because one kid in a fucked up family family is more resilient and maintains an optimistic outlook, gets themselves out of the situation, and has a good life, the other kid who succumbs to depression, gets addicted to drugs, and becomes an indigent person just should have been more like his sibling and done better. That's like the worst caricature of right-wing television pundit-speak.
Yeah, at one level that would have been great, maybe there were choices that individual could have made and things would have turned out better. But denying coming from a fucked up family and having a mental disorder can create individuals who go off the rails is just dumb.