I guess veterans etc. who suffer throughout their lives with it just aren’t sufficiently resilient?
I mention this because pointing to the physicality of psychological conditions often induces a sense of fatalism that often isn't warranted per se, and can become some sort of self-fulfilling prophecy.
Again, this does not mean people should just pull themselves up. It does suggest that people could in principle learn coping mechanisms (through therapy etc.) to a degree that allows for leading a fulfilling life, even with PTSD manifesting physically in the brain.
The bits that won’t go away are the dread, the insomnia, the constant anxious waiting for the sky to fall. I think I’ve pared off the behavioural bits over the years and have largely addressed them - but my mind continues to wrestle with intangible beasts.
My cousin has just qualified as a psychedelic therapist, so later this summer he’s visiting and we’re going to try breaking the cycle.
Sustained and elevated stress causes damage to the whole body, not just the brain. If understanding what you experienced as brain damage helps you accept how things happened and how things are, then all the more power to you.
But if there is something in your thought patterns that you want to change, but feel hopeless that your brain is damaged, I recommend trying to find another framing aside from "damage".