Victims of trauma dont just forget because time passes. They graduate (or dont) and move on in their lives, but the lingering effects of that traumatic experience shape the way the look at the worlds, whether they can trust, body disphoria, whether they can form long-lasting relationships, and other long last trauma responses. Time does not heal the wounds of trauma, they remain as scars that stay vulnerable forever (unless deliberate action is taken by the victim to dismantle the cognitive structure formed by the trauma event).