In a similar vein, with respect to "there are no atheists in foxholes", A three-tour-of-duty-in-Vietnam captain in the US Army (Harry McMenamin) said, "I was an atheist when I was in Vietnam, and I was in a lot of foxholes. There are atheists in foxholes."
My family is forever destroyed from "tough love." I'm in my 50's and we still don't talk except for exchanging cards with the parents at various appropriate times throughout the year. They've apologized, but the scars are very deep.
We grew so distant that it is no longer repairable, and so we at least maintain that very distant relationship. I don't communicate in any way with the siblings since "tough love" taught me to despise them. Obviously I don't despise them any more, but the damage is done, and quite thoroughly.
I'd argue that the key word here is "trauma"; I think _adversity_ can make you stronger (more disciplined, and more focused), but I think that Dr. Bernstein is using the word "trauma" in its technical, medical, sense, i.e. "Psychological trauma is caused by an adverse experience, or series of experiences, that result in an injury that changes the way the brain functions, impairing neurophysiological, psychological, and cognitive functioning." [0]
There is large heterogeneity in the reaction of individuals to the sane exact experience, and sometimes what initially appears damaging ends up doing the opposite.
There is a circular definition here. If we define trauma in terms of harmful outcomes, it's bad by definition, but that's arguing semantics and not psychology. The slipperiness comes in when we switch definitions mid-paragraph.
You'll also see virtually everyone 300 years ago was exposed to things which would be considered traumatic today. It's how we evolved.
We've got a bad theory of trauma and resilience.
The problem is, it's hard to define where the line is - and the line is different for everyone.
That's why, I think it's important the people who need to go through that should know and decide they want to do it.
As a parent, I would never force my kids to go through that, unless they understand what it implies and they want to.
2. It's called post-traumatic growth, and there's an emerging mass of research on the subject.
What doesn’t kill you makes you stronger. Problem is, it does “kill”* some people.
(*) Sometimes literally, but probably more often figuratively.