This is certainly wildly untrue for many sorts of trauma. What doesn't kill you can leave you less capable, weaker, more vulnerable, etc...

You might have to be resilient to deal with the trauma without collapsing, and then find that you still have to be resilient to deal with your new, permanently changed life after the fact too.

No one ever became stronger by getting their legs crushed by a ton of metal. In fact, I'd argue they mostly became weaker.

That is motivational, but inaccurate.