Just another generic statement. Keep believing something and it becomes a self fulfilling prophecy.
To say your friends will never recover is a matter for them. If they choose not to recover they won’t , if they choose to try to recover it is entirely possible that they will. To recover from trauma takes self reflection, and possibly professional help and the will to recover. For a person to realise that they have a choice to recover and then apply themselves to change their internal dialogue, takes intellect, courage and determination.
To simply state that people are traumatised and will not recover is simplistic and lacks insight.