Careful, that was literally the exact same selling point of Electroconvulsive therapy 80 years ago.
Electroshock therapy for behavioral modification in schools: bad
Modern Electroconvulsive therapy under anesthesia: actually effective and arguably lifesaving for severe clinical depression.
Is that just violent punishment / torture by another name?
If not, I suggest we leave it up to the patients and their doctors to determine whether or not ECT is improving their lives, or not.
Not available to everyone yet.
It was falsely maligned in the "One Flew Over the Cuckoo's Nest", because it can _look_ upsetting. However, even when it was done without anesthesia, it caused amnesia so patients didn't remember the procedure itself.
That's also how dissociative sedation works. You don't remember being sedated, and you are not (psychologically) traumatized by medical procedures happening during it. I had it several times for minor oral surgeries, and it's great.
And the modern ECT is also done under deep sedation.
I don't think the human memory is well understood enough to say for sure whether consciously forgetting something means that there aren't still effects of your body having experienced the trauma in the first place. The mind, it would seem, goes deeper than conscious recollection, and perhaps beyond the brain.
Plenty of children abused before they can remember it still have exhibited signs of harm from the trauma.
Sometimes it helps, if the hammer is hitting just the right place. Often it does nothing, letting the underlying disease to progress. And in distressingly many cases, it can harm patients.
This absolutely applies to the ECT.