I cannot disagree more. This hypothesis is extremely dangerous to people suffering and on the brink.
Trigger warning for violence to children. I'm an adult who has suffered immensely from anxiety. It was hard to make it through my 20s alive. I recently remembered several traumatic incidents from my childhood that I'd completely forgotten (I grew up in a really violent area: middle school crush almost kidnapped in front of me, gay friend taken to "pray away the gay" and never coming back, friend held up at gunpoint, was personally mugged, sexually assaulted, and almost kidnapped, all before the age of 17 when I moved out on my own). Let me tell you that "closing the stress loop" on those events was _extremely_ important for my ability to move on. Before, when I could not remember the events, it was a struggle to get through life at all. One day I had a specific nightmare, and the memories came rushing back. I confirmed with my family these had happened, so it's not my imagination.
For the last two years I've used CBT, talk therapy, and journaling to process that trauma and resolve those issues. It's been a lot of remembering them, talking them through, and just what is called "closing the stress loop". I've read books about PTSD, I've talked to people about it. I've cried, yelled, gone for long runs, and had long walks in the woods. And now for the first time in my adult life I'm not feeling that crushing sense of impending doom. Sure, it still comes back sometimes, but generally it is "resolved". Sometimes I feel a stab of pain about it, but then I feel sad, process the feelings, and move on.
Perhaps for you and your trauma, moving on without processing it is the right choice, but for me it absolutely was not. If you'd asked me in my twenties and early thirties, I would've have said "no thanks, talk therapy is dumb". I'd tried it a few times with bad providers who just drugged me up but things didn't improve. Meanwhile I had A Plan that I considered several times an hour, was spending at least a hour a day crying without knowing why, and was a functioning alcoholic. I'd tried some talk therapy, and it wasn't until I found a CBT therapist at a research program who takes outcomes extremely seriously that I felt like I was getting measurable improvement.
I'll leave it with: there's a huge difference between ruminating and processing trauma. The dose makes the poison. Just like there's a difference between binge drinking a bottle of jack every night and 100ml of wine with dinner once a week. (Although I'm completely sober from alcohol now, good riddance).